This is one SKETCHY 2000W Power Supply
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We got a cheap 2000W power supply designed for mining... could it possibly live up to it's output? Also seriously don't do anything we did in this video, playing with power supplies is a very bad unless your name is Mehdi.
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MUSIC CREDIT
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CHAPTERS
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0:00 - This 2000W Power Supply
0:54 - Crucial
1:06 - LTT Intro
1:16 - A Warnung
2:25 - It might be fine?
4:20 - Poking around in some PSUs
6:28 - Why our Silverstone is heavier
7:34 - Metal Oxide Varistor??
9:06 - Our Overkill Test Rig
10:00 - Seriously do not do this
13:39 - Hooking up the PC
14:19 - Powering On
15:30 - Adding in the 800W 3090
17:17 - RTX 3090Ti Drivers are Mangled
19:05 - Can it survive Furmark x2?
20:29 - Vessi
21:10 - Ourto
@dumpsterdawg 2 роки тому
David: "You have life insurance right?" Dell: "Yes, We sold him multiple warranties"
@ali99_82 2 роки тому
Yessss
@user-op8fg3ny3j 2 роки тому
Surprised he wasted money on a policy given how financially secure Linus is already
@vyvianalcott1681 2 роки тому
@@user-op8fg3ny3j Life insurance is to protect your earning potential, not your current holdings. It covers what he would have brought home to his family for the remainder of his career.
@alexanderanastas-hill5487 2 роки тому
comment of the day
@bigsmoke6414 2 роки тому
so, if youre Linus breaks, you can just return him and he will be fixed (imagine indian female voice)
@jacksonbutterfield9669 2 роки тому
I love how the least sketchy part of this video is probably the 2000W power supply itself
@jackielinde7568 2 роки тому
No, because I would have taken a 240 V extention cable and modded it with a 120 V female socket, not the other way around.
@edwardallenthree 2 роки тому
truth. why didn't they just use the pdu from the million dollar server?
@NikolasOldSchool 2 роки тому
Why you are so scared of 240V?
@armadillito 2 роки тому
@@jackielinde7568 why? Wouldn't that be rated to a lower current?
@edwardallenthree 2 роки тому
@@NikolasOldSchool because North American electric infrastructure is unsafe at 120 volt.
@DigitalJedi Рік тому
You can tell Kyle is an engineer by the way he refers to parts. Also the bit about why he hasn't sent a product yet hits home.
@ChilenonetoYoutube 2 роки тому
i love how they treat the 240 v cable like high tension or something, when almost everywhere in the world you use it to power your blender at home.
@WeiFinder 2 роки тому
They treat it like that because its a ghetto style contraption
@Fenriswaffle 2 роки тому
Watch what happens when you put a toaster meant for 120v on 240v. The issue isn't necessarily that 240v is dangerous (though technically it is) but that this is thorough misuse of cabling which creates an inherent feeling of risk since it can overheat, melt, catch fire, short, etc etc.
@ChilenonetoYoutube 2 роки тому
@@Fenriswaffle yeah but they use high tension cable (used to power 480v or higher stuff) to power up a simple machine.
@LuLeBe 2 роки тому
@@ChilenonetoUKposts Because the cable should always be able to handle more load than the breaker, and I'm assuming they don't use the little 12 or 16A breakers for their 240V circuits ther like we do in Europe. So the current could be a LOT higher, hence the bigger cables for these systems. Obviously that cable was oversized for the PC, but not for the breaker.
@leerman22 2 роки тому
@@Fenriswaffle It's all about idiot proofing stuff when it comes to electric codes, and these are idiots :P
@philtkaswahl2124 2 роки тому
I love how they arbitrarily labeled it with 95 Plus Gold because 95 > 80 therefore better; but not 100, of course, because that would just be silly.
@Xeonerable 2 роки тому
who knew a chinese knockoff brand could be so humble and not go all the way..!
@thunderarch5951 2 роки тому
Well, since it's about efficiency, at least they know you can't have 100% efficiency in a power supply, lmao
@AdrianOkay 2 роки тому
110 platinum psu: with a stirling engine inside that generates extra power from excess heat
@danimayb 2 роки тому
No PSU can be 100% efficient, So at least they got that right lol
@Razz_Putitin 2 роки тому
@@AdrianOkay 100% efficient means no excess heat :P
@TheOnlyBootlegger 2 роки тому
The "Warnung" is the actual German word for "warning." You can tell it's meant to be one of those multi-language labels because of the Spanish "peligro" below it and the French "attention" to the lower-left. The issue is they didn't put a single other German word on it.
@Matty.Hill_87 2 роки тому
I was thinking it was probably a multi lingual thing
@almerindaromeira8352 2 роки тому
Yes, the warning in English is right beside it on the left. No typo there
@its_cedced 2 роки тому
I think it was a type issue because I don‘t think that Linus can speak German
@enmunate 2 роки тому
You would think that people from a bilingual country would understand that.
@MrBlackFiction 2 роки тому
Thats why i clicked the Video in the first place... wanted to know why they put a german word in the thumbnail.
@sammorgan31 Рік тому
I think I would've just made a resistor out of nichrome heater elements to test rather than plug it into all that juicy hardware.
@TheSecretman82 Рік тому
But that's not entertaining or suspenseful. While it makes for a better test, this makes for better TV(Or UKposts, whatever you want to consider it.)
@TotalDbag24 Рік тому
I mean, they bought a load test center, so honestly they probably put it on that before actually risking all that hardware.
@sammorgan31 Рік тому
@@TotalDbag24 I mean, I said "I think I would've"
@jaykoerner 2 роки тому
In three wire 220/240 volt(or four wire for that matter) where the two hots go doesn't matter since they are completely opposite phases and are indistinguishable on the device side, it also doesn't have a neutral because it creates a phantom neutral at the center point of the two phases
@TealJosh Рік тому
Ground on the other hand is absolutely required. Terms neutral and ground are often mixed up in everyday speech.
@TheOmegaAlfa 2 роки тому
It’s funny that PSU testing setup for 6160 USD was missing the device measuring power draw for 30 USD.
@seushimarejikaze1337 2 роки тому
@reconz 82299 you dont know work/pain unless youre hammering a nail with a rock xD
@coolsnake1134 Рік тому
They would’ve needed a clamp amperage meter on each of the hot legs because those kilowatt power meters I think only work on 120 V if they plug that into their modified extension cord they would fry it
@samuelrodriguez6684 2 роки тому
Alex: "Don't touch these" Kyle: *immediate physical contact*
@sewing1243 2 роки тому
@@BlueHound Unless the PS was connected to power I can think of no way a transformer could possible injure someone (other than a possibly sharp edge or something pointy sticking out of them). Also Linus seems to think Transformers have magnets...since when do transformers have magnets in them?
@RaiderX303 2 роки тому
They stated early on that both PSUs had been powered off for over a year so we're safe to touch. Normally you wouldn't want to touch as the capacitors could still hold a charge
@Mbadly 2 роки тому
Like they are propably safe after a few weeks, they are 99,99999% safe after a few month, that being said. Don't touch them they could theoretically still hold a charge but you know, they propably dont
@--_DJ_-- 2 роки тому
Alex: CYA statement Kyle: I know how long they have been on the shelf.
@flavioernst902 2 роки тому
These are just some caps. Yeah you would get a shock like in the order of magnitude of an electric fence. But not really dangerous
@tankgrrl 2 роки тому
Kyle: *points out the tool cabinets full of tools* Alex and Linus: *still yolo with whatever tool is closest to their hands*
@cardboardsnail 2 роки тому
15:55 not all cables are actually copper, especially in cheap PSUs. Some use copper clad aluminum, or even just straight up aluminum
@ao_qd 2 роки тому
I miss these types of "Don't ever do anything you see in this video, but here's some detailed instructions on how to do it" videos. It reminds me of an old video where Linus showed us how to make our own 7v fan speed reducer out of extra molex adapters.
@TheAdatto 2 роки тому
Yeah use 5v for netative an 12v for postive so you have 7v
@MrHack4never 2 роки тому
If you dig into the 20/24pin connector, you can also find -5v and -12v to play with, giving you a voltage choice of 5, 7, 10, 12, 17, or 24 volts to play with If you also use the +3.3v line, you have 1.7, 3.3, 5, 7, 8.3, 8.7, 12, 15.3, 17 and 24 volts to play with
@stickfigureman3D 2 роки тому
@@MrHack4never cool! ........why would I want this? Not being snarky I have no idea what this would ever do for me
@MrHack4never 2 роки тому
@@stickfigureman3D You can use 24v to fry your fans😃
@hunzhurte 2 роки тому
Linus did WHAT?
@LastKnight0727 2 роки тому
okay, I actually jumped at the point where they pranked Linus when he put his head against the PSU. Send this to GN as a gift to see if they can blow it up with their tester.
@grozaphy 2 роки тому
Me too. My slow af brain was like wait what, why is he smiling
@zector0 2 роки тому
Yes, having actual professionals test it sounds like an idea Linus would never entertain though.
@paulbrown3820 2 роки тому
I'm happy to see I was not the only one.
@ryanhamstra49 2 роки тому
@@zector0 yeah, a testing lab would be a stupid idea
@Arthurocha 2 роки тому
Yeah, it scared the heck out of me too XD
@DaLoveDonkey69420 Рік тому
the 13:36 "hey stop" i felt that lmao
@Killerspieler0815 Рік тому
@Linus Tech Tips - You would be much saver when fixing a German / Korean style (recessed earthed) outlet to the output of your modified cable , because Germany has 230 Volts ( + 16 Amps) & there are plenty o IEC computer power supply cables for German / Korean outlets ... the 2x 110 Volts in Canada / USA are no problem at all because the German plug / outlet is not polarized anyway & some regions use 2x 110 Volts with German style outlets (50 or 60 Hz) ... AND don't forget to crimp the fine strands of the flex ! Also the German / Koren system does not let you touch live contacts (in opposite to the literally shocking Canada / USA system) ... Trust me I know what I tell you , I'm a German & I did serval plugs / outlets my self & even connected a 3 phase stove ( 400 Volts) without ANY incidents over the years
@BlackHawkBallistic Рік тому
If you have half a brain and know how to read a basic wiring diagram neither of those are that hard, now if you're doing it live that's when you need some more finesse
@Healvia 2 роки тому
"Warnung" is "Warning" in German, they just wrote it there in different languages, not a spelling error.
@gerritaddiks5098 2 роки тому
Came here for this. I first thought that youtube now started translating the thumbnails.
@MischievousMjolnir 2 роки тому
@@gerritaddiks5098 Same lol
@HerrSeelenflug 2 роки тому
But they still didn't put the actual warning text there in German, like they did for the other languages lol
@MischievousMjolnir 2 роки тому
@@HerrSeelenflug They translated "warning" and then they got scared of German grammar 😂.
@deusexaethera 2 роки тому
I thought that was "Achtung"?
@LimeymanZero 2 роки тому
13:35 Whoever did that should get a bonus or something, that was gold!
@iClone101 2 роки тому
I almost fell out of my chair when then happened
@mytwosats3178 2 роки тому
A moment of tru fear.
@swagatrout3075 2 роки тому
got actually scared there..!
@Walking_Death 2 роки тому
That's how you make an electrician throw whatever he is holding across the room. Hilarious stuff 😁
@geekinthehattech 2 роки тому
I jumped and my heart rate when up! LOL
@marcogonzalez1558 2 роки тому
The ad queues are always my favorite part each video! LTT never fails :)
@Kyal- Рік тому
Honestly, crucial is such a great brand, never had any of their products fail after years of heavy use, and they are so well priced in the states. Great sponsor haha
@gamm8939 2 роки тому
1:23 "A Warnung" is actually kinda funny, cause Warnung means warning in German
@lucvandoornick2323 2 роки тому
Alex: Dont touch the transformers! Kyle: Proceeds to casually touch them 60 seconds later
@StudioAREshorts 2 роки тому
I presume that this warning would be more important after the equipment has been energized.
@gamm8939 2 роки тому
Considering that he is an eletric engineer, he probably knew that he PSU had been off the grid for over a year and so its safe to touch. The warning was more for casuals like us, because if you touch does a day after you used it, you are gonna die
@nielset5771 2 роки тому
He's definitely a mechanical engineering btw, it is not the transformer but the capacitors that are dangerous.
@3DJLab 2 роки тому
@@gamm8939 I have taken electric shocks from PSU's like that countles times. I never learn. Long as the current doesnt get through your heart or other organs you are fine. Mostly my fingers have got some nice jolt of electricity, i wear rubber work boots and im careful to not touch with second hand to something else when im checking things. I yesterday got such jolt from TV's psu because i touched wrong component accidentally, it was plugged to wall when diagnosing. So no you are not going to die if you are not touching something else same time or if floor doesnt conduct electricity
@Damicske 2 роки тому
Transformers are harmless without a wave going in and they are isolated. The underside of the pcb is dangerous with the high voltage caps
@Lynkah 2 роки тому
I really love the chemistry between all of the LMG employees. It's like they've all been friends since childhood lol. Get yourself friends, colleagues and family that you can smack-talk and roast for fun, that's where true happiness is, in my opinion.
@TheWunder Рік тому
My friends always tend to leave when I run out of cash.
@Lynkah Рік тому
@@TheWunder it's all good, man. Everyone makes poor connections throughout their life. You'll find some friends you'll live and die for, in time. You just need to keep cutting the bad friends out. Don't let them convince you they have your best interest in mind.
@Ronnie_ColemanTopG Рік тому
At 11:39 this reminds me of Mr.Boom the electrician everybody used to watch back in 2017 and he would end up exploding his creations on accident by letting wires touch and it really shows how lucky he is for his whole outlet not to explode and catch on fire
@jimmihenry 2 роки тому
15:00 you should have a power meter in the outlet to sensor the power pulled from the wall!
@LolSho0orTs 2 роки тому
They also should have shown us the temp on that back panel they have a thermo camera, meh .
@AndrewMuraco 2 роки тому
Also just send it the GN to blow it up
@adriandunn1596 2 роки тому
@@09f9 An imported one could be both fairly cheap and 220V. True it would have needed a corresponding power socket and IEC lead from a 220/240V country too. That wouldn't be a bad idea though, no need for the sketchy warning label to indicate the voltage.
@mlw19mlw91 2 роки тому
Yes then he could measure efficiency 😁
@jimmihenry 2 роки тому
@@mlw19mlw91 He could calculate the power drawn by the computer, if he knew the efficiency of the power supply. As i understand they are estimating the power consumption of the computer... They have no clue if the power supply can out put 2 kilo watt. If they knew the power draw than they could calculate the efficiency, YES!
@wal 2 роки тому
I test car and home amplifiers to show their actual power output because this has gotten so out of hand! Many use “MAX” ratings we call “ILS” ratings (if lightening strikes) 😬
@minenachos 2 роки тому
Big D in the house. Or is it diriculous
@KiinaSu 2 роки тому
Even for reputable brands? Because I mean if you buy a 5000W amp from some chinese seller for 30 bucks you can be sure it won't even reach that. It's like these 5 TB USB sticks from wish. But I doubt Yamaha would lie about the output.
@minenachos 2 роки тому
@@KiinaSu years ago reputable manufacturers Kenwood, Alpine, Pioneer, JVC, Sony, and Panasonic claimed double the wattage for peak envelope power or pep. I believe it was jenson that started the max power. And if you're old enough you'll remember Roadmaster they was the worst
@Elkarlo77 2 роки тому
@@minenachos But reputable manufacturers had still the sinus Wattage somewhere written down. At least here in Germany (we have great consumer laws which sometime enforce such comparable moves, don't know if it was enforced.)
@seldoon_nemar 2 роки тому
Dewalt's drills are/were branded "20v MAX"... that was not saying they are 20v tools, they are 18v tools with a surge draw of 20v max... they actually had to change the branding in some places (aus if memory serves)
@matthewmcphail7703 7 місяців тому
the MOV's were the small blue discs on the left side of the video at 8.11 NTC label'd parts are use to measure temps, likely part of the safety shut off circuit that'll kick in it things get to hot (and also activate the fan etc). they will change resistance depending on the temp
@MrKillah101 Рік тому
The best LTT videos nowadays are without a doubt the ones where Linus and Alex does some dumb shit like this. Pure gold!
@Tilt_TM 2 роки тому
I'd love to see Gamers Nexus put this thing on their power supply tester
@AC3handle 2 роки тому
This is exactly the thing that I was thinking. Why risk good or even decent components when you have a testing unit that can stress test, and survive any power supply jankness that ensues? Like...mosfets explody?
@bland9876 2 роки тому
Was about to comment that.
@davidfernelz 2 роки тому
@@AC3handle because LTT does it the "fun" way and GN does it the legit way
@lasthamsterstanding 2 роки тому
Yeah send it over to them!
@Lazirus951 2 роки тому
Was thinking the same thing. Would've loved to know the actual efficiency rating.
@TylerFurrison 2 роки тому
I can't wait for my 99 minus palladium 4000W power supply for $15
@ronniecunningham9145 2 роки тому
Lmao right
@preciadoalex123 2 роки тому
Hey collin
@merwie 2 роки тому
Overpriced
@StefanellNahuia 2 роки тому
The pfp tho🤮🤮🤢 Not enough that he's a furry,he's aleo gay😂
@preciadoalex123 2 роки тому
@@StefanellNahuia OwO
@Mayhemkiller200 Рік тому
Would love to see this tested when you have the power supply tester up
@teamavk 2 роки тому
Hearing someone say Yebo in a LTT video @ 8:22 absolutely made my day! Thx Kyle (from a fellow Saffa!)
@Daniel10663 2 роки тому
13:35 I literally thought something popped when he held it to its head , I jumped lmao
@ceedrik3212 2 роки тому
"Do not repeat this at home!" Proceeds to give a detailed instruction on how to do it at home
@AmaroqStarwind 2 роки тому
“Yes, this gunpowder recipe is the real deal.”
@loiccorriveau4641 2 роки тому
That Hey stop from Linus at 13:37 was PERSONAL
@alanmoore78 2 роки тому
yes, never mix 120/240 stuff, years ago we had an "electrician" hired by the property management who came in and said, oh, that 240 outlet in your living room, I can replace it with a 120 outlet so you can use a smaller air conditioner. He changed the outlet, didn't mention he wired it wrong, and he "borrowed" our bedroom AC unit (a $700 Friedrich 12000BTU unit that worked flawlessly and had a digital display, remote, all sorts of nice features) to test it and promptly let the smoke out. Of course they fired him over this, but offered to replace the AC unit. When the property manager showed up all smiles with a 5000BTU $98 Walmart unit thinking that was a perfectly adequate replacement, we filed that away and when it came time, chose not to renew our lease.
@SunnyShuklathedoctor 2 роки тому
NVIDIA is probably like "eh, who's gonna have 2 3090s when you only need 1 3090TI" and proceeded to have the most smartest dumb engineers.
@OOFERenjoy Рік тому
spelling mistake : you dont need to more
@spv420 Рік тому
@@OOFERenjoy fun fact : no one cares
@gayasslily Рік тому
@@OOFERenjoy spelling mistake: you dont add spaces before :, ;, ,, ., ?, !, /, -
@BeetleBuns Рік тому
@@OOFERenjoy there are no spelling errors in op's comment.
@OOFERenjoy Рік тому
@@BeetleBuns "most smartest" more like "smartest" you boomer dont know spelling huh? go back to grade 1
@Verlisify 2 роки тому
13:35 is one of the best jokes this channel has ever seen
@NFStopsnuf 2 роки тому
That spooked me
@eliasroshus 2 роки тому
True HAHAHA
@N1NT3NDUD3 2 роки тому
Omg lol I actually laughed out loud
@qwertykeyboard5901 2 роки тому
i loved that.
@thesuperzfamilyvlog6607 2 роки тому
I freakin jumped 🤦♂️
@mittensfastpaw 2 роки тому
Always a fun ride for something like this with oddball issues.
@a3s1r1986 9 місяців тому
That pop as Linus listens to the power supply is comedy gold!
@AbrasiveCarl 2 роки тому
Alex is like the only one there that just spends linus's money on anything and linus just eats it up..
@nexxusty 2 роки тому
Alex is by far the most intelligent, most knowledgeable person there. That's why. He just cannot speak like Anthony.
@FlandraLabs 2 роки тому
Brandon's been there for more than a decade. They probably have over a million CAD in camera/video shooting equipment alone.
@sxndwich3395 2 роки тому
@@nexxusty well no lt really Alex's intelligence is based more on engineering and physical things, Anthony's a tech wizard, on the other hand.
@ovaerd 2 роки тому
@@sxndwich3395 I would literally trust Anthony to do anything and succeed. My best friend it's like a copy of Anthony and he can't even burn food. It's impossible to him to fail. I love both Alex and Anthony tho. I just really think people underestimate Anthony but 7 bet Linus knows exactly what he hired when he hired Anthony. #Anthonysquad
@nexxusty 2 роки тому
@@sxndwich3395 Anthony doesn't know any more than Alex does, and I honestly don't know why you think that.
@tehbeard 2 роки тому
Insurers: "Couldn't you have just shipped this to Tech Jesus to test with that fancy PSU load tester of theirs and done a collab?"
@ender-gaming 2 роки тому
Yep my first thought was like man this would be a lot safer if they borrowed Tech Jesus's equipment. But that'd possibly get less views...people like danger.
@KillaBitz 2 роки тому
I've been asking Steve to test these for a year now.
@juntapiezas 2 роки тому
@@KillaBitz And Linus took a year to remember them having one to test.
@artbeautyandmadness3091 2 роки тому
The probable reason the PSU case is getting hot: The internal transformer works at high frequency above 20,000 HZ and is working way above it's Ampereage capacity, as a result, it's High Frequency magnetic field expands beyond it's physical core structure, as a result, the AC magnetic fields bombard the external steel case, heating it like an induction cooker. I've seen the same phenomenon when a high frequency transformer is overdriven. The more you know. A few things to look for: The extension cord modified for 240 volt: I see a fire risk because the indicator light on the business end is now dissipating 4x the power. they are neon lamps with a series resistor. Unplug when not in use.
@zedalert 2 роки тому
You should buy professional load equipment, it can be controlled digitally, measure voltage, etc. It is way better than a regular PC with two GPUs.
@rabeandre2 2 роки тому
I'm sure you know this, but Warnung is simply the German version of warning. It even has the correct English spelling just to the left of it
@jaden.umiguess 2 роки тому
Never knew that
@lordrefrigeratorintercoole288 2 роки тому
its ACHTUNG in german... oh wait it was a joke... dumb me.
@iamlookto 2 роки тому
@@lordrefrigeratorintercoole288 no, Warnung is the german word for warning. No joke here. „Achtung!“ is like „Attention!“…
@FuryYT 2 роки тому
@@lordrefrigeratorintercoole288 Dumm? xD
@FuryYT 2 роки тому
@@iamlookto Yes.
@iamnickdavis 2 роки тому
When that dude in the back clapped @~13:40, I almost lost it, LOL.
@ElNegus9985 2 роки тому
That scene jumpscared me.
@theCoolDie 8 місяців тому
scared the shit out of me
@pilotboy217 2 роки тому
I bought something similar when building my PC and it was a 1050w power supply, very weird bronze rated power supply and its been running strong for 3 going on 4 years already. No problems at all. I kinda jumped the gun and got the biggest power supply I can find for cheap so that later on if I wanted I could put a bigger GPU and CPU since they would draw more power. Still don't know the name of the brand but it came in a red box. I think it's Apevia.
@ArnoModelstate 2 роки тому
US can use 240V if wired correctly in the junction box though so you could ask you electrician for that :) Though they might not recommend it for misplugging mistakes and blowing up your 110V stuff so make sure it's labeled or altered plugs !
@Tyler_0_ 2 роки тому
@8:35 "NTC" stands for negative temperature coefficient, these devices are used for inrush limiting. When you first plug the power supply in all those caps will be charged, and without that NTC resister it can blow fuses or breakers.
@ald3nt3 2 роки тому
i mean it could be used for temperature measurement, but inrush limitting probably makes a bit more sense
@itsTyrion 2 роки тому
TIL
@HalianTheProtogen 2 роки тому
SHODAN be praised!
@rexsceleratorum1632 2 роки тому
@@ald3nt3 For temperature measurement, way higher resistance NTCs are more convenient, of the order of 10k
@ald3nt3 2 роки тому
@@rexsceleratorum1632 Yeah you're right, just checked the datasheed, it has indeed an R25 of 5Ohm (and like 145mOhm at standard operation).
@Neoxon619 2 роки тому
If Alex is there, you know something is going to be very questionable in terms of if it’ll work. That said, 2000W may be more needed at the rate CPU & GPU power consumption rates are increasing at.
@thunderarch5951 2 роки тому
Pretty sure if you'll want a Rtx 4090 the bare minimum will be 1300w, seeing how much the 3090ti consumes and rumors saying it will only get worse
@Mr.Morden 2 роки тому
That's an understatement. At the rate we're going we will need electricians to install a dedicated circuit for the computer. Not to mention a second air conditioner for the gaming room.
@moritlh 2 роки тому
We are at a time when we need to work on efficiency (climate change and oil prices) and those companies are just going backwards. People should boycott those extremely inefficient GPUs but who am I kidding.
@StevoHDA 2 роки тому
next generation is the last one these criminal chipmakers are gonna get away with inefficiency
@haywire9174 2 роки тому
@@thunderarch5951 cpus won't take more than 250 at the max, rest of the computer maybe 150, that's 400, max load, with the 4090ti being around 500 watts. 1000 is fine
@larskleijn 2 роки тому
i love the chat in between tho XD we need more smack talk
@kontziarris8615 Рік тому
Note: switching mode transformers(the ones used in most power supplied nowadays including pc power supplies) don't have "magnets". Actually no transformer, toroidal, iron core, or ferrite core. has magnets. The material used in transformers for modern pc power supplies is copper and ferrite which is not a "magnet." Magnets can be used to concentrate or to control the flow of electrons but not in a transformer where the core gets to do all the work. Magnets are used in magnetrons to help micorwave ovens produce microwaves more efficiently for example.
@ryanhamstra49 2 роки тому
10:30 “don’t ever do this, but if you do here’s how you do it.” Ok there Valve!
@luqdude 2 роки тому
I wanna see GN test this with their proper testing equipment
@DrakkarCalethiel 2 роки тому
This needs to happen, I wanna see that puppy put to its max and maybe put out the magic smoke like our good old Gigabyte PSUs.
@BruceCarbonLakeriver 2 роки тому
THIS !!! :D
@Ormathon 2 роки тому
@@DrakkarCalethiel The smoke will be accompanied by a big bang and shrapnel. Maybe even a fireball or plasmaball O.o
@DrakkarCalethiel 2 роки тому
@@Ormathon I hope that it blows the gigabyte PSUs out of the water when it fails, pun intended. :D Would be great to watch if one of the main switching FETs would completely grenade the entire board when blowing up.
@shrekken2326 2 роки тому
This is a fast food channel, check gamers nexus for indept stuff
@dumbfuckjuice1146 Рік тому
hey as far as i care u should start doing sketchy adventures with quirky people love ur old vids
@dan110024 2 роки тому
NTC = negative temperature coefficient. It's a thermistor. As temperature rises, the resistance goes down. On the other hand there are PTC's (positive temp coefficient) which increase in resistance as the temperature goes up. Used a lot in HVAC.
@captainmarshalliii3304 2 роки тому
Linus and Alex executing on half-baked video ideas is by far my favorite video concept.
@Knightswords 2 роки тому
Should ship that to GN and have them do a full a test suite on it.
@Ocastia 2 роки тому
Jup im very confident that tech Jesus can get that thing to blow up, or at least give it an award.
@KillaBitz 2 роки тому
I've been asking Steve to look at these for a year now.
@TheHammerGuy94 2 роки тому
Yes they should I mean their equipment can test any psu's claims of being a certain wattage So it WILL see if it can run 2000 watts
@plazasta 2 роки тому
@@Ocastia the "somehow not as bad as Gigabyte" award
@Ocastia 2 роки тому
@@plazasta it could conceivably get that award, however I don't know if it could get the: "better than Dell" award, because that's the only place where Dell doesn't suck as much as they usually do. Still a very low bar.
@bazrazin1 2 роки тому
did you check the connector wires, cooler master & corsair really use very good quality cables to minimize the voltage drop at such high rated currents, i had a cheap 'with the box smps' whose mobo & cpu wires were quite sub standard warm to touch & just powering the 65w cpu, also try to measure the dc ripple on the lines.
@rustyshakkleford 2 роки тому
Every time I see those shots of the shunt modded 3080 I feel just a little bit better about my soldering ability
@casedistorted 2 роки тому
Linus having a scale with his own meme face on it just screams Linus.
@kilbymorgan8626 2 роки тому
Imagine working there and almost every tool you are given to do your job has your bosses face on it. lmao
@blockbertus 2 роки тому
I think dbrand shipped them a lot of their Linus meme face stickers... Like a dbrand level of "a lot".
@informatiger9501 2 роки тому
"Warnung" is german for warning so this is probably not even a mistake.
@okj579 2 роки тому
The only problem is they forgot to put a German warning under it 😆
@gintonic5770 2 роки тому
Had to scroll too far for this comment :D Thank you
@TereziPyrope413 Рік тому
i love how much enjoyment linus gets from the german spelling of warning
@csvscs Рік тому
That was the most consensual genuine employee banishment I've ever seen
@Hybris51129 2 роки тому
I really want to see Steve at Gamers Nexus hook this thing up to his test equipment.
@walkir2662 2 роки тому
This needs to be Patrick Stoned indeed.
@BenQuigley 2 роки тому
@@walkir2662 wait, Patrick is stoned?
@nunyabeeswax3012 2 роки тому
Or better yet, Aris from Hardware Busters.
@1tominator 2 роки тому
Power in Japan is much more messed up. They run at 100v Ac but the east and west run a different frequencies (50/60 hz). This can mess up motors or time keeping equipment built for the other frequency and require huge height voltage dc interconnects to merge the different grids.
@knislappen 2 роки тому
Wtf why
@DielectricVideos 2 роки тому
Not to mention that 100V and 50Hz is pretty much the worst combination for operating single-phase rectifier loads... Lowest possible voltage and longest interval between capacitor re-charges.
@ashlyy1341 2 роки тому
@@knislappen iirc it's due to post-ww2 aid in rebuilding infrastructure - one side adopted 50hz (German system) and the other 60hz (US system). i don't remember the specifics but it's related to who aided and also the country being occupied postwar
@youkofoxy 2 роки тому
we use 220V 60Hz and 110V 60Hz. so it's double the fun.
@jasonriddell 2 роки тому
@@DielectricVideos NEW York 25 HZ power just entered chat
@nerdysquirrel4039 Рік тому
Love the disclaimer to modify the extension cord 😂
@MaciejZalucki Рік тому
Devices designed for 230V generally are polarity agnostic. Virtually all sockets are not polarized in Europe and most of the world so it does not matter which one is neutral for such socket. That being said, both can be hot. The ground has to be separate simply because you can't assume that neutral is one or another even if you'd want to (not mentioning about ground fault protection). In NA you can commonly see 240V transformers grounded in the middle which means that both ends are 120 and -120V, two phases. That's why you can connect them together to have full 240V potential difference (doubling the power). Quite neat. It's different if you have three phase though, in this case it will only be 208V for two 120V phases that are only 120* apart (not the full 180* which are completely opposite).
@MRDSTUDI0S 2 роки тому
Linus and Alex: Never do this because safety. Alex 10 seconds later: Here is how to do it 😂
@ettoresalvatore9437 2 роки тому
Reminds me of my dad: "Son, this is a bad idea, you should never do this. Now hand me the wire strippers so I can do it."
@nicholasvinen 2 роки тому
If you don't know exactly what not to do, you could do it accidentally.
@mcpr5971 2 роки тому
They should have cut out the whole part about making the cable and not shown the plug. That's better than saying "don't ever do this" and then show step by step how to do it.
@512TheWolf512 2 роки тому
Which is why I COMPLETELY disagree. THIS is exactly what Louis Rossmann complains about, the culture of ownership and repairing your own things yourself is dying because you are obsessed with safety, even with something as EXTREMELY simple as an extension cord
@PippetWhippet 2 роки тому
@@512TheWolf512 And that’s how we know you’ve never had to escape a house in the middle of the night because it’s on fire.
@khonjel_singh 2 роки тому
That clap at 13:30 really got me lmao
@ichliebeschwanze9752 5 місяців тому
I love how the thumbnail says "WARNUNG", probably just a typo, but in german "Warnung" means warning, so you just made the thumbnail for all you german viewers. Probably someone has already noticed, but maybe everyone forgot a year later. Thumbs up for the thumbnailartist.
@ZacharyZwanenburg 2 роки тому
"It's probably fine!" My favorite LTT quote
@andrewapicture 2 роки тому
The wattage checks out (they just added it wrong), according to the label: 3.3vdc × 25 amps = 82.5watts 5vdc × 25 amps = 125 watts 12vdc ×150 amps = 1800 watts 12vdc × 0.5 amps = 6 watts 5vdc × 2 amps = 10 watts all together thats 2023.5 watts
@10100rsn 2 роки тому
I think the 3.3V and 5V rails together are not supposed to exceed a combined 150 watts and that is why they are stuck together in the table. It is a quirk of how some multi-rail power supplies are designed, usually because there is a tap on a secondary winding of the transformer that causes this where if they were separate secondary windings altogether it would not have that limitation. That leaves 150 + 1800 + 6 + 10 = 1966 watts total which is close enough. They may have just mislabeled the 12v rail.
@Silvar55x 2 роки тому
@KABAKOKSEK Often times consumer PSUs are built to offer options on how you want to distribute the total wattage. Each rail is separately able to support higher wattage, but there is a tighter limit on how much they can add up together. This means that the beefiest components (AC side) can be built to lower spec, which lowers cost.
@samiraperi467 2 роки тому
@@10100rsn Still, the label has an incorrect result for the +12V rail. The PSU wouldn't reach 2000W but it's close.
@skyemperor2357 2 роки тому
As you are really knowledgeable about physics could you tell me how would one go around calculating V,I,R when two of these are given both in series and parallel. It would really help if you could tell me how to for example mathematically separate currents at the two resistors in parallel to compute their values when V and R are given. I have a test on Tuesday and would really appreciate the help. All 6 scenarios for series and parallel.
@omniyambot9876 2 роки тому
@@skyemperor2357 since you are already on youtube, there are tons of videos about ohm's law that are great and would surely teach you the simple concept albeit hard to imagine for beginners. Also, your question is a bit broad and unclear. This comment is also not talking about resistance, but power. Goodluck to your exam.
@Fayeluria 2 роки тому
"Let's get an expert to tell everyone what's going on" "Here we have a lot of chonky bois"
@zachcrawford5 2 роки тому
Spoken like a true expert.
@rexsceleratorum1632 2 роки тому
The "expert" has no clue whatsoever. He thought an NTC, labeled an NTC, was a MOV. He's never heard of NTCs apparently
@dpsuper6891 2 роки тому
The Power-Supply Plug is also used for 240V, so that wouldn't be a problem tbh. And almost all devices that accept these types of plug work with both 240V and 110V, but you should always check if that's true before you power stuff with a plug like that.
@raycert07 Рік тому
I've had my fair share of dma driver verification errors recently on my oddball gpu. To fix it, seems like I have to disable something related to forcing dma in the bios. It worked no problem with a normal card like my old 770. I hope that fixed my issue and that it's not random, I hate when I think I've fixed something that was hard and it happens again.
@wolfwilkopter2231 2 роки тому
Actually Japan has another quirky thing to consider.: half of the country uses 60 and the other half 50Hz on their 100Volts due different deliverers after the war and the infrastructure that has been built upon them, which are now not to be messed with anymore. Thats why there was a time when Japan had 2 versions of everything, just to be able to work in the part of the country that it is needed, nowadays most stuff usually supports both frequencies tho.
@osopenowsstudio9175 Рік тому
Can you explain why different frequency need different device tu use it?, I'm not an electrician but I'm curious
@DamnedAngel96 Рік тому
@@osopenowsstudio9175 not an electrician myself, but might be the same for 100V or 120V, needs a different transformation for each one
@darekmistrz4364 Рік тому
@@DamnedAngel96 Actually difference in frequency is a difference in "speed". Keeping the voltage the same, but changing the frequency can cause a 3 phase motor to spin faster. This in essence is a problem for all older type of devices like washing machines and frigdes that used pretty simple 3-phase motors to drive them. Difference between 60hz and 50hz is about 20% so it basically means that your fridge/washing machine either runs too fast and can be damaged because of 20% boost (if it runs on 60hz but was designed on 50hz). Or the other way it runs 20% slower and basically is less powerful in comparison to what is should be.
@TheLucidDreamer12 11 місяців тому
@@osopenowsstudio9175 the technical reason is because the electrical impedance of inductive and capacitive loads against alternating current is directly proportional to the frequency. This affects how much current is flowing through an AC circuit for a given load and affects how much power the resistive loads receive in the electrical network. A frequency mismatch can cause a light bulb to receive too much or too little current, for instance.
@iiimaskyiii7816 7 місяців тому
@@TheLucidDreamer12my man did not use a simple laymen term😭 he said he’s not an electrician Dawg💀 how is he gonna know what those words in sequence mean
@unknown_matter7818 2 роки тому
"Don't touch these" *electrical expert touches them*..... On a serious note, they aren't stressing it enough in the video and explaining why it's so dangerous to open a power supply. The caps can hold charge long after being unplugged! It literally can kill you folks! Same goes for appliances like a microwave.
@iClone101 2 роки тому
Makes sense, since the electrical expert knows what he's doing and the average viewer does not.
@ccoder4953 2 роки тому
What you say is true, but it's also true that most reputable power supplies have bleeder resistors across their large caps, so they will be completely safe within a few minutes, worst case. So, the Silverstone, probably perfectly fine. The other one. Who knows. If they copied a Great Wall, and didn't skip those components to save a few cents, maybe.
@mycosys 2 роки тому
@@iClone101 lol, he really didnt
@niky00045 2 роки тому
go watch electroboom. electricity through the body is only dangerous if it passes through the heart.
@ccoder4953 2 роки тому
@@niky00045 Pretty much true, but it is also possible to stop your heart with the energy stored in a cap, especially a large one. Just depends on the path the electricity takes as it flows through your body. That's why TV repairmen often worked with one hand behind their back - to try to prevent any shocks from flowing through their heart.
@jaifien7356 2 роки тому
that clap whenever Linus put his ear the the power supply scared tf out of me 😂
@Stefan_38 Рік тому
I love when you said "dont do this is lf your not qualified" but you just showed us how to (im talking about voltage transforming)
@wub6022 2 роки тому
I'm really enjoying Kyle and Alex, they have really good chemistry and when linus is around it's the angel and devil on his shoulders
@alexmentink8567 2 роки тому
"Do NOT ever do anything we've done in this video. That being said, here's HOW you do it." These guys know that people are morons and want you to at LEAST know how to properly do something stupid BEFORE they go and hurt themselves. How responsible!
@swapnilchaudhary2944 Рік тому
Because some people will definitely do this and its better if they do it right
@anastasiao4036 Рік тому
Morons will moron. Best thing to do is to moron responsibly
@Trappy-C Рік тому
@@swapnilchaudhary2944 l
@Curt_Sampson Рік тому
Though they could have just taken a little extra effort to do it right in the first place, and also replaced the NEMA 5-15 outlet with an IEC C13 outlet (that plugs directly into the PSU), avoiding ever having 240 V power on a 120 V outlet. Even easier yet, as well as more flexible, would just be to buy a North American 240 V extension cord and put their 240 V connector directly on the IEC cord, so you'd still have just one plug to replace and it would be utterly clear (because of the short cable length) that the IEC cable was 240 V.
@Atomy111 Рік тому
Well there is too many people on earth so whats a couple of morons 🤣
@chan.sorman Рік тому
In the UK (w/ 230v 13A electricity) school children are taught how to wire electrical plugs at school (normally when about 13-14).
@UPROARIOUSDINGUS Рік тому
13:32 I never seen Linus so nervous, love your content. Definitely lurking the channel for a minute, at first I thought you were a scam tech guy. Now your exposing scam tech companies. You’ve earned this sub 😅
@Syfes 2 роки тому
Japan actually only uses 100V in most places, and then to make it more complicated the south-west of the country is 60Hz and the north-east is 50Hz
@Sirikiller 2 роки тому
Half as interesting viewer?
@rockytom5889 2 роки тому
Wait. How in the hell do you make a grid that has different phase frequencies?
@Sirikiller 2 роки тому
@@rockytom5889 ukposts.info/have/v-deo/hZ9pbLB4bKSilYU.html
@jt.... 2 роки тому
@@rockytom5889 You don't. Japan has two grids
@rockytom5889 2 роки тому
@@jt.... Ok that makes more sense. But even still, why make then different? Is it a case of it being too expensive to replace old tech or what?
@colewelden 2 роки тому
I feel like a better method of hitting that 2000 watts may have just been to use it as intended. With some risers, and like 8 low end cards mining, you could easily hit a higher power draw. I understand not wanting to risk high end hardware, but surely they could use a bunch of old RX cards at least. I was curious when it would stop working and if it could actually deliver 2000w. Sometimes PSU companies will list a peak rating and not sustained. Also I would have loved to see a Kill-A-Watt or something like it with a real wattage read out. Would love to see a revisit someday.
@colewelden 2 роки тому
Obviously it probably isn't a good idea to use something like this, but it would be cool to know that 2000 watt ATX power supplies exist for ~$150.
@dlipford370 2 роки тому
Yeah I was expecting the same thing. Just use mining software to push the wattage limits, it's so easy to versus the trouble he was having running benchmarks on individual cards at the same time.
@iClone101 2 роки тому
Also it's probably only useful in countries where power is free for the individual, considering how power inefficient that thing would be and how much profit you'd end up losing to electricity bills.
@711jastin 2 роки тому
@@iClone101 certain regions in china has very cheap electricity, and are often chosen as mining sites before the legality shifts. i've heard electricity as low as 5 cents per kilowatt. some miners simply build water dams to power their mines. electrical cost is almost negligible for eth mining.
@mycosys 2 роки тому
Much simpler way would be some old school halogen car headlights
@ArkhamHedler 4 місяці тому
In Brazil there are two voltages, 127v and 220v, in some places it is only 220v, in others there are both, 127v and 220v, and in certain houses you can find 220v and 127v sockets and they are not different sockets, sometimes it is a socket with different color or has a label saying it is 220v, but that doesn't stop you from being able to plug something with 127v into the 220v.
@jarphabib 2 роки тому
Impressive dedication to hackery! Though, uh, you can get computer power supply cords with NEMA 6-20 ends already on them.
@10100rsn 2 роки тому
8:15 NTC thermistors is used for inrush-current limiting. When the capacitors on the input side of the PSU are fully empty and the NTC is cool to the touch the NTC thermistor adds resistance to the AC circuit to gradually charge up the capacitors over a longer period of time instead of trying to charge them up very quickly all at once. As power starts to flow through the NTC thermistor it begins to heat up and the negative temperature coefficient (NTC) means as it heats up the resistance gets lower making the NTC thermistor look more like a direct wire in circuit instead of a resistor. So it might start at like 18 or 20 ohms but as it warms up it changes to less than 1 ohm over a fairly short period of time. It basically makes sure you don't blow the mains breaker when you first plug in the PSU...
@gazooc 2 роки тому
It's a little frustrating that LTT has very high demands for hiring people in LAB, but these people end up knowing their job poorly. None of the people in the video could find out the markings of the mosfets and calculate the maximum available current, no one opened the datasheet for the transformer and сheck its maximum power.
@Psrj-ad 2 роки тому
so its for soft start
@AppleGameification 2 роки тому
@@gazooc since when is this ltt labs
@latemhh5577 2 роки тому
Kyle not recognizing labeled NTC was really painful tbh
@skyemperor2357 2 роки тому
As you are really knowledgeable about physics could you tell me how would one go around calculating V,I,R when two of these are given both in series and parallel. It would really help if you could tell me how to for example mathematically separate currents at the two resistors in parallel to compute their values when V and R are given. I have a test on Tuesday and would really appreciate the help. All 6 scenarios for series and parallel.
@LiveEnjoyment 2 роки тому
The true difference with the silverstone is the cleanliness of the output signal, meaning no ripples on the volt lines. This helps with your lifespan of the products and puts less strain on the power circuitry of the other components.
@Arelias95 2 роки тому
It would be cool if they could hook up an osciloscope and show the signals. Could be another great electroboom collab.
@PsRohrbaugh 2 роки тому
It's also important with system stability, especially when overclocking.
@LordOfNihil 2 роки тому
psu reviews really need to look at the power quality on an oscilloscope, both idle and under load.
@aleksazunjic9672 2 роки тому
Not really. You see, Intel defined voltage specs for PCI and they are pretty loose for todays standards. Nevertheless, everything that you install on MB (RAM; CPU, GPU etc ...) has to conform to these standards, therefore everything runs ok even on PSUs with lower tolerances. Simply, components expect certain ripples and are not damaged by them.
@jonathanellis6097 2 роки тому
No ripple I don't think is likely. Very low is probably more realistic.
@void_snw Рік тому
Doesn't matter how long it wasn't plugged in, dielectric absorption is no joke. Guitar amp techs have felt it.
@BraulioHernandez-sj6cv 9 місяців тому
That explains something lol I worked with a decent backpack vacuum with a 50 feet cable which I just unplug from the outlet and I didn’t turn it off before and it shook me I grab it
@sdjoensson 2 роки тому
You should have gotta a power monitor directly on the poweroutlet, that way you could have seen how much power went into the system.
@amitdutta736 2 роки тому
8:42 That is not a MOV, it is a thermistor (NTC type) generally use to prevent inrush current (soft starter)...etc (NTC Type - Resistance is inversely proportional to temperature)....Conclusion of Linus: "Based on the temperature of inductor"😮💨😮💨😮💨 ...You guys need proper Electrical/Electronics/Instrumentation Engg in your team.
@UnknownS0und 2 роки тому
Yeah, normally I enjoy LTT antics but this particular Video was just too cowboy for someone who knows even the basics of electronics
@garci66 2 роки тому
yeah.. that's a bit sad. They are not teaching but rather confusing more people. Same thing with the dead GPUs from ebay video where they were just bypassing MOSFETs. In most cases, the mosfet would be a switching component (as in part of a switching power supply) and not just a "relay" allowing current to pass. A GPU has no need to turn on some parts of its circuitry on demand.
@josephsanchez08 2 роки тому
Yea sometimes I question the EEs they hire. If your in product development you know there’s so many ppl from SI to PI to EMC to validate everything.. good times tho
@codebasher1 2 роки тому
You need to ensure the Gnd lead is a little longer than the other two. This ensures that is the cable is pulled out the GND wire will disconnect from it's plug last.
@JellyAge 2 роки тому
Furthermore they forget to use wire ferrules.
@r00234 Рік тому
Pretty sure they also reversed their polarity, and probably murdered the copper cabling with those wire snips when they were stripping it. If you are going to rewire a plug, definitely don't refer to this video for reference. 😂
@Curt_Sampson Рік тому
@@r00234 What polarity? North American 240 V is delivered as two 120 V "hot" conductors, one 180° out of phase with the other.
@smalltime0 3 місяці тому
@@Curt_Sampson It somewhat depends, industrial locations (where they shoot) don't use things like Ufer grounding and I think they in particular have multiple voltages and 2 and 3 phase outlets.
@Curt_Sampson 3 місяці тому
@@smalltime0 This is my point. If you're using two conductors to connect to 2-phase power (such as North American residential 240 V), there is no "polarity": both conductors are "hot." (I don't know what "Ufer" grounding is, but polarity is about hot vs. neutral, not about ground, which is a completely separate thing.)
@takjr0 2 роки тому
Teclab channel already tested one of these (or really similar) on a test loader, if I remember if failed really bad on the test loader (and the ripple just went insane).
@counterlogicliving6518 Рік тому
- "do not touch this" Comes the specialist and touch everything
@viperwizard491 2 роки тому
NTC (thermistor) is simple softstart for bulky capacitors TVS (voltage transient suppressor) suppresses over-voltage/lightning transients
@chaitanyasindagi1237 2 роки тому
You guys should do collabs with actual electrical engineers who know what goes into power supplies to do side by side analyses like this. The size of a transformer for a given wattage and frequency is mostly the same regardless of voltages unless you're at very low or very high voltages. And PFC is necessary for anything at this power level regardless of voltage level. Weight difference could come from smaller filters on the AC side resulting in more EMI, smaller inductors and caps on the output meaning higher output ripple. It could also be that they used higher switching frequencies which would shrink weight and size a lot at the cost of efficiency which people are a lot less likely to notice
@debojitbhattacharya4093 2 роки тому
alex clark guy is an actual ENGINEER!
@noneofyourbusiness4294 2 роки тому
You do know that Alex is an electrical engineer, right?
@timnone2924 2 роки тому
As everyone's said that's Alex, also Kyle is an electrical engineer as well I believe
@joemarais7683 2 роки тому
They do have actual electrical engineers. They just don't put in the time and effort to actually analyze anything cause being "probably correct" is all they need for a profitable video.
@imedjendoubi6401 2 роки тому
Agreed 👍👍👍
@ShadyHero 9 місяців тому
can't wait in ten years when we have to plug our PCs into dryer sockets
@ShadyHero 9 місяців тому
HAHAHAHA NEVER EXPECTED THEM TO ACTUALLY DO THAT 10:03
@ryankm48 Рік тому
White and black are both hot in 240v at the power plant they generate 240v spinning alternators 1, -1 and basically you send one of the legs to ground and that is how you make 120v. 240v alternating current, you get both sides so it altenates between both sides. Both white and black are used and thus are hot.
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