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Will be 750W enough

post #1 of 6
Thread Starter 
for 2x Sapphire Radeon HD 6970 2GB GDDR5 + 2600K rig? Or should I aim rather for 850W or even more?
Thinking either about Corsair AX750 or AX/HX850.
Thx
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post #2 of 6
Yes, a quality 750W should be enough to power that rig.
People always over estimate the power that they need.
    
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post #3 of 6
Under load with the HD6970 you'll probably looking at 550-600+ Watts alone and at stock clocks (under load) the i7 2600K pulls about 130 Watts. I'd probably say get the HX850, that said if you got a watercooling system get something a bit more beefier.
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post #4 of 6
Quote:
Originally Posted by starpwnage View Post
Yes, a quality 750W should be enough to power that rig.
People always over estimate the power that they need.
^This. Indeed they do over estimate the power need.

AX750 should be easily enough. I bought HX750 for my future Gtx 570 SLI + i5 2500K setup.
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post #5 of 6
750w is more than enough
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post #6 of 6
Quote:
Originally Posted by Code Geass View Post
Under load with the HD6970 you'll probably looking at 550-600+ Watts alone and at stock clocks (under load) the i7 2600K pulls about 130 Watts. I'd probably say get the HX850, that said if you got a watercooling system get something a bit more beefier.
Not even close. A single HD 6970 draws 215 W and 2 would probably draw <400 W. Overclocked, you might get a draw of 450 W. Then an OC'd i7 and you're pulling 180 W extra. Then add 50 W for mobo, HDD's and fans. 450 + 180 + 50 = 680 W. And that's an absolute maximum draw which your system would rarely see.

Sources:
http://www.hardware.fr/articles/817-3/resultats.html
http://www.tomshardware.com/reviews/...cy,2850-9.html
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