Just downloaded the CCC 13.1 Drivers for my Sapphire 7950 Vapor-x and on black ops 2 im hitting another 15+ FPS
/just now did a test on Battlefield 3 and i used to hit 75FPS now word of a lie im hitting on average 92.6
Its gave me better performance by far.
3dMark 11 @ Performance settings graphivd test only. : http://gyazo.com/f2a40d5f9e72448f1a70a344f5c8def2
If you were running 12.10, the performance difference could just be from the 12.11 updates that are included in 13.1. I largely though 13.1 was just a routine update that optimized some game profile (and significantly reduced frame latencies on the 7950), though I havent had the opportunity to play any games using 13.1 yet.