Thanks. I will re-OC it to 3.0.
I'm on a 23" monitor playing at the native resolution of 1920 x 1080. Is a single 6950 really enough to play BF3 at max settings without lag? Since that is what i'm aiming for.
Also will the GC even fit in my CM 690 case?
Since BF3 is a very demanding game, so I'm pretty sure you can't maxed out that game without lags or glitches...
Surely a single HD5950 is not enough, but remember that your CPU is still from old generation which will limited your PC performance.
Take a look at this:
I'm sure any GC will fit into your case.