with Q9550, testing the 1024MB @ 4GHz gives me normally 50GFLops all the session but sometimes in other sessions it would drop to 30GFLops, I keep closing the program and reopening till the first test finish with normal GFLops and I leave it to continue the other runs. Also when producing 30GFLops, temps were lower by 20c compared to 50GFLOps and the CPU usage was 100% either with the 30 or 50 GFLops.
happens on Windows 7 x64 and Windows Vista x64