Hi, my card asus 5870 Default value Default value - if i just change on the frequency is ok - if i change on "Clock info 00" the frequency plus the voltage : i dont have the new frequency and they return at original at 850/1200 and remains blocked all the time at this frequency. And the voltage is not good is all the time 1.15 although i put 1.3, 1.35 etc... is just have 1.3 if more at change on "GPU register" the "0x15' value to 1.3 But the frequency remains blocked. - if i dont touch voltage on "Clock info 00" but juste on GPU register whatever the value that gives at "0x15", "0x17" or "0x18 is the default value (1.1250) which appears in 3D mode. Is juste if i change the "0x16" that changes with the value I give it 1.3 if i put 1.3 etc in 2D mode... I try with ATI and MSI bios is same thing.