3-way SLI GTX 580 PSU requirements?

[ambam]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817256054&Tpk=silverstone%201500w

One GeForce GTX 580 will consume 350W+ of power at 100% load. Not to mention the power draw from your CPU, RAM, motherboard, and other components.

Will the silverstone 1,500W PSU fully power a 3-way SLI GTX 580 system?

 

[joytech22]

350W Each? Something's not right there.
On Nvidia's official site, they list the card power at 244W each.

I know I'm still over-compensating here, but I think you would be better off with a Corsair AX1200W. I'm not sure on pricing on PSU's at the moment but I'm sure others will have better alternatives.

EDIT: I forgot to say yes, it will power the 3-way 580's (the PSU's you and I mentioned).

 

[ionut19]

I don't think you get 350w per card. Probably around 300w in some cases so a 1.5kw psu will suffice with room to overclock your CPU and video cards also.

Video card, CPU, Motherboard, these are the biggest power consumers, in that order inside a PC(from gamer lvl up). The rest do not use that much power.

 

[Kari]

at TPU they measured maximum power usage at 326W running Furmark stress test, 'normal' games wont use that much power.
http://www.techpowerup.com/reviews/Powercolor/HD_6850_SCS3_Passive/25.html
I wonder how much folding@home would draw...

 

[jsc]

joytech's got it right. 3 way GTX580's will pull about 60 amps - 720 watts, peaking at 70 amps. Figure 120 watts for the CPU, 100 watts max for motherboard and memory, and say 50 watts for 2 hard drives and a non-BlueRay optical.

Those are worst case, peak estimates so a good 1200 watt PSU would be enough.

I prefer to operate a PSU at around 50 - 70% of capacity, so I'd use a 1500 watt PSU.