Some cards are OEM models and will only run half speed with AMD drivers. You need to use the driver from you card manufacturer.
Just got 7850 crossfire for Christmas and I was like WTF they run slower than my old 5830s!
After a while I figured out the were running 430/600 instead of 860/1200 and it was only fixed with the manufacturers driver disc.
Just got 7850 crossfire for Christmas and I was like WTF they run slower than my old 5830s!
After a while I figured out the were running 430/600 instead of 860/1200 and it was only fixed with the manufacturers driver disc.
What?! I'm not saying I'm the know-all source for GPU drivers, but I've never heard of anything like that.