Ok. Boost sucks. I bought my first 7950 that started at the original 800mhz no boost. That was all good, overclocked well and didnt fluctuate fps or voltage. Then i decided to crossfire it with another and the only thing i could get was a boost edition.
So.... I flashed my original card with a boost edition bios so they would be in sync. What a mistake. Fps were all over the shop in crossfire mode! Not to mention voltage. I found that if i put 20% on them it seemed to fix the fluctuation alot at stock speeds (850-925) but when i overclocked them beyond those speeds it would just go silly again on the fps and voltage (monitored through AB).
Fix.... I found a bios that was an original 800mhz XFX one that worked on both cards!
Overclocks well, no need to put 20% and no fluctiation on fps or voltage in crossfire mode. This will also work with just one card coz i had no issues with my original 800mhz non boost edition.
It took me a while to find a bios that was compatible for both cards but i didi it.
Cheers. Hope this helps coz it helped me! All the best.
