500w PSU enough for SLI upgrade?

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Barney Willis

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Jul 30, 2013
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Hi guys

So my PC as it stands is this:

CPU: i5-3570k 3.4ghz Stock cooling
GPU: GTX 660 2gb Gigabyte OC Edition
Mobo: Z77MA-G45
PSU: OCZ CoreXStream 500w
Ram: 8gb Corsair Vengeance
HDD: 640 gb Samsung
Also have a case with 4 fans.


I want to work out if this build could take a second 660 with the same PSU or would I need to upgrade both?


Thanks!
 
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jb6684

jb6684

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Feb 20, 2011
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An OCZ is not a great supply. They rarely rate their supplies to produce full power "continuously" which you need for gaming.....

PSU:
http://ocz.com/consumer/psu/corexstream-500w-power-supply/specifications

GPU:
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-660/specifications

So....
200watts System
140 watts per GPU (280watts combined)
Totals out to 480 watts.....

That's just too close to Max load for reliable operation....

Suggest a Corsair 750watt TX (or HX/AX series) would be a good fit for your Dual GPU setup....
 
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