I've installed a new cooler with 4-pin fan on my Sapphire HD4850 and then set the Duty cycle min in the BIOS to 25% (to 45° C). Although the temp is at 38° C max the fan is always running at 100% (GPU-Z says 0% with ~1933rpm ). When I start CCC and switch to manual fan control it works (GPU-Z shows correct percentage) but switching back to Automatic results in 100% fan speed regardless of the temperature (<40° C).
With the old Fan the pwn control was ok but why not with the new one???
With the old Fan the pwn control was ok but why not with the new one???