PSU for 2 GTX 570's SLI

Hi, Is an 850W OCZ GameXStream PSU enough to power an i7 950 (OC'd) and 2 x GTX 570's in SLI?

I have heard that you need a 1000W PSU for a setup like this.

Thanks
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  1. I'm not very known on the OCZ GameXStream PSU's, but if it's a decent PSU the 850W should be enough to power two 570's in SLI, even with an OC'd CPU/GPU combo.

    Oh, and with "decent PSU" I mean something in the class of the Cooler Master Silent Pro series, Corsair TX series, Antec High Current Gamer series or Corsair AX series. They are stable and actually strong enough to maintain the high load from the 570's and the rest of the system.
  2. You definitely don't need a 1000W PSU for that system.
    http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-11.html
    Geforce GTX 570 2-way SLI
    Active Idle: 145W, Furmark: 556W
    Those numbers were taken at the wall so 10-20% can be taken off to get an idea of what their system actually drew, and I think that number could be used as a ball park figure for what your system would draw on maximum load.
    That kind of maximum load would only stress an 850W PSU to ~60%.

    So yes your PSU is powerful enough to power your system with two GTX 570s.
  3. Silvune said:
    You definitely don't need a 1000W PSU for that system.
    http://www.tomshardware.com/reviews/crossfire-sli-3-way-scaling,2865-11.html
    Geforce GTX 570 2-way SLI
    Active Idle: 145W, Furmark: 556W
    Those numbers were taken at the wall so 10-20% can be taken off to get an idea of what their system actually drew, and I think that number could be used as a ball park figure for what your system would draw on maximum load.
    That kind of maximum load would only stress an 850W PSU to ~60%.

    So yes your PSU is powerful enough to power your system with two GTX 570s.



    Thanks Guys
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