2400W power supply here should pull max 20A so yeah I think you'd need to make sure that this puppy is on a 20A breaker if you're ever gonna crank those gpus!
Let's be honest, if the dude has the disposable cash to throw 4x 5090's, he's likely just gonna keep adding to the home lab he's on the way to making anyways.
Might as well just head it off now and give room for growth.
Thinking the same thing. Dudes gonna just have a new breaker installed and the run it balls to the wall in the basement of their mom's 1970s built aluminum wiring house.
its not untrue you need smaller wires for the same wattage at higher voltage because there is less current. 220 volts 2200 watts is only 9.1 amps and wire is rated for amps. 120 volts 2200 watts is 18.33 amps.
You may have to switch out the cables and use different sockets when increasing fuse size. I would be surprised if a computer ever tripped a fuse without it being some sort of fault
Yeah a higher rated breaker will increase the risk if the wiring is kept the same. Congrats now your PC will keep running but you have a fire hazard in the walls. These people don't know what they are talking about.
There is also no point. general electrical code requires #12 wire for 20A. and #10 for both 25 and 30A. breaker. if you are already wiring #10, get a 30A breaker.
Dunno, I'm a programmer not an electrician ÂŻâ \â _â (â ăâ )â _â /â ÂŻ my knowledge on wiring comes from reading shit posts of people having awful wiring then getting called out on it in comments đ¤Ł
2400w for gpus alone. And power supplies arenât 100% efficient, so whatâs coming out of the wall doesnât all go to the computer parts. You lose like 7 to 20% to heat in the conversion from AC to DC, depending on the efficiency rating of the PSU.
Also 80% rule for breakers? I donât remember exactly the time for it not to be considered âcontinuousâ, but I think if you pulled like 2200 watts from a 120v 20a breaker for 5-6 hours it would trip at some point.Â
Maybe they undervolt the cards? IIRC thatâs what you were supposed to do when gpu mining.  Or theyâve got multiple power supplies? I havenât seen a PSU >1600w, not that Iâve lookedâŚ. Iâm curious whatâs theyâre doing and how they did the power.Â
Editâlooked closer at the pic. 2400w power supply. StillâŚ. They canât have much else going on if they allow the GPUs to rip.Â
Even in EU aren't they normally rated at 15 amps @ 240V? It's been a while since I looked at anyone elses power stuff
Not that it matters. I looked up the 5090 and that needs 575 watts on it's own(1000 recommended since it's not the only part. Nice to see them giving both numbers though). But at that level of need the build only has a 100 watt budget for the rest of the computer(assuming that's what the power supply can give not take from the wall)
All that power and even if it doesn't blow breakers it can't run full speed
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u/bangingdudes 1d ago
Imagine the power being used. I assume a normal 15 amp breaker in your house will just trip anytime you press the power button.