Is 660w enough power for 2 7950's?

denney

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Mar 30, 2009
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Hi guys. I've been doing some reading and have conflicting reports on what power is required to run 2 x 7950's in Crossfire.

My current setup is:
CPU: i5 4760k (not OC'd but would like to)
RAM: 16GB G.Skill Trident X 2400
MB: Asus Z87-Pro
PSU: SeaSonic SS-660XPII (660w)
GPU: Sapphire HD7950 Vapor-X

I'd like to get another 7950 and some reports are that 660w isn't enough but others say the 55 amps provided with a quality brand PSU (regardless of wattage) will be fine. The PSU supports the 4 x 8 pin PCI-E connectors.

Any thoughts? suggestions?
 


Yes, but as Sakkura said, don't OC those 7950. You can OC your 4670k without affecting the whole system's power consumption much, also.
 

denney

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Mar 30, 2009
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Yeah, I doubt I would even need to OC the 7950's for awhile. Plenty of power as it is. The CPU is what I'd be more interested in OC'ing.