AMD HD 7970 or HD 7950 on PCI-e 2.0x8

Basically, would PCI-E 2.0 x8 negate the differences in raw performance between the HD 7970 and the HD 7950? Especially if I overclocked the HD 7950? I will crossfiring whatever I get with an HD 7970 I already have.

Here are my system specs for reference:

*Intel Core i5-750 @ 3.8GHz

*VisionTek AMD HD 7970 @ 1025MHz GPU and 1575MHz GDDR5

*G.SKILL Sniper 8GB (2 x 4GB) DDR3 1600

*Kingston HyperX 3K 120GBx2 (non-raid)

*PC Power and Cooling Silencer Mk II 950W

*Monitors - 24in 1080p x3 for Eyefinity
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  1. Best answer
    If you're doing CF I really think you need to be doing another 7970 if you've already got one, otherwise you very well may cripple yourself if you can't reach the now-theoretical OC you wish to reach.
  2. Best answer selected by revfarquhar.
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