Getting around around 307 kh/s with 7950, XFX Double D Black Edition FX-795A-TDBC. No HWs so far even with this TC. Now if only I could get on a stable pool..
-I 20 -w 256 --thread-concurrency 19712 --gpu-powertune 10 --gpu-engine 1050 --gpu-memclock 1500
I am getting a stable 240 kh/s with your configuration and the same gpu ...
Have you done something else ?