thanks mate
I've installed SDK 2.4 but gpu usage is still ~50%
Crap. Now try underclocking your memory to 300 MHz, maybe that helps...
I've tried this already
Did you try leaving it alone(logoff or unplugmonitor or..) and calculate from "2^32 * share/s = hash/s" from your pool site(~3hours to get most accurate). I know there's some variance, but should clearly see if they are still running 50% or 99%.
and this too
ok, I will try, thanks