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How much power will I need?

Last response: in Components
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October 15, 2012 6:26:40 PM

Hi all,
I was wondering how much power I will need in my soon to be built gaming rig.
My specs:
i5 3570k
ASRock extreme4 z77
8GB Corsair Vengeance
Antec Three Hundred Two
Disk Drive
Western digital caviar blue
Windows 7
Sapphire Radeon HD 7950 OC edition
Cooler Master Hyper 212 EVO

I have been looking at the XFX pro core 850w as I want enough power to crossfire which I may do so in the future, however I have heard, even with the crossfired GPUs, that this is still overkill.
The 750w model however is only £5 cheaper than the 850w model.
Thoughts?
Thanks :) 

More about : power

a b ) Power supply
October 15, 2012 6:53:46 PM

200W per GPU
150W for everything else

Add 30% for safety margin, minor upgrades, etc. and my recommendation would be something north of 700W from the usual suspects.
October 15, 2012 8:36:19 PM

Thanks guys. Im gonna stick with the XFX pro core 850w one as it is bronze certified and has plenty of power for me to upgrade my system.
On a side note, how well do you think this pc will run Crysis (1) and BattleField 3?
Thanks again
!