I am seriously pissed off by now. i bought an Asus HD7950 Direct CUII TOP V2 5 weeks ago and from the get go the card wouldn't perform well in games, even though it is doing fine in Benchmarks. BFBC2 on lowest settings (DX9 all that good stuff), the framerate is 40 fps lower in average than the framerate of my old GPU, the HD6870 (that's 35 fps when the chat is open, 20 fps when i open the scoreboard). same rig. The game freezes every 10 seconds for a few moments, there is black flickering all over the place. CoD4, same stuff. Artifacting all over the place. Quake live and MSI kombustor have problems with letters, like this.
So i was around in some forums and i contacted the Asus support. i overclocked my CPU, i RMA'd the card twice (they sent me a broken one the first time), nothing has changed. The temps are all normal, i tried several drivers, all the same result (yes i wiped it clean). NONE of the problems occur when i put my 6870 back in. 2 weeks ago i finally decided to send a support ticket to AMD, the confirmation mail came 3 days late, and i haven't received an answer ever since. for me there are only three more explanations for this. 1) your drivers are garbage. 2) the GPU doesnt work well with a PCI 2.0 interface 3) the CPU is bottlenecking (makes no sense, the framerrate should be the same as the 6870 then). I am in my final stages of patience.
AMD FX4100 (4.2 GHz)
Asus HD7950 Direct CUII TOP V2 (stock clocks)
TeamGroup Elite 1333MHz 8GB
1080p monitor on DVI-D
Corsair Force 3 60GB
WD 500GB green drive
fresh Win7 Home Premium 64bit