Power supply question

will a crosairHX 650w support 2 gtx470s sli?

Case: antec 902
Motherboard: ASUS P7P55D-E Pro LGA 1156
CPU: intel i5 750
RAM: crosair 4x1gb 1066
HD: western digital 500gb 7200rpm
Graphics Card: msi twin frozr nVidia Fermi 470 (hopefully sli)
PSU: CORSAIR HX Series CMPSU-650HX 650W ATX12V v2.2 / EPS12V 2.91 SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Power Supply
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  1. Best answer
    i wouldnt recommend it.... a good 750 watt should do it, the gtx 470 is a power hungry card
  2. hmm i just bought the psu less than 3 days ago lol would hate to return and get a bigger 1
  3. ill stick to 1 470 i guess. and when i create my new build with sandy bridge next year ill buy another psu. thanks brotha
  4. Best answer selected by jason gran.
  5. It will be close, but you'll be ok. The GTX470 is rated at ~220W. So two of them should be around 440W. To make the math simple, lets say 450W. Toss in another 100W for the CPU, and another 50W or so for the mobo/ram, and your looking at ~600W for the system. I'm sure as a Corsair it can output most of that 650W on the 12V rail, but having 50W of breathing room isn't that good of an idea.
  6. ok will my 650watt psu run 470 OC'd and i5 Oc'd?
  7. Yes.
  8. you sir ...are the shizniz tyvm
  9. OC'd? I doubt it. You should be fine at stock. A mild OC on the CPU is probably ok, more so if you don't up the voltage. I wouldn't OC the GPUs however.
  10. im just going to buy a 850w corsair hx =\
  11. will the 850 run 2 470s/sandy bridge i7?
  12. Should be fine.
  13. look at this look at the bit that shows power usage, a single gtx 470 draws 366 watts on load while playing crysis, the gf100 cards are very power hungry
  14. Not correct Gordon. A SYSTEM with a single GTX470 draws 366W. There is no way a GTX470 can draw that much power.
  15. ^+1

    I ended up returning my 650hx for a 850hx. so no worries either way lol. gordon should have let this thread die :$
  16. 4745454b said:
    Not correct Gordon. A SYSTEM with a single GTX470 draws 366W. There is no way a GTX470 can draw that much power.

    lol are you sure, that seems a mighty low wattage for a system on load, i myself have an ATI card, so i wouldnt really know, i heard that the gf100 cards were power hungry though
  17. If it were the card only how would it get that much power? 75W comes from the motherboard, and you get another 75W from a 6pin plug, or 150W from an 8pin. To get To get 366W you'd have to have two 8 pin plugs on the card, with the extra 66W coming from the motherboard. Can you link any GTX470 cards with two 8 pin plugs?

    The max TDP of the GTX470 is 225W (I think). Most cases it won't go much over 200W. I think the GTX480 is 250-275W.
  18. yes it says Total system power draw

    The GTX 470 idles at 33 watts and maxes out at 215 watts, compared with a 27-watt idle and 188-watt max for the HD 5870.
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