I just installed the cooler, the temp looks good. Fan speed is 21% at idle, and loading FurMark is only 27% yet still keeps the temp around 63C, before with the stock cooler, the temp goes up to 89C. And even I turn the fan speed to 100% using Catalyst fan control, it's silent. But look at the fan speed, crazy number, sometimes it jumps to those huge numbers and sometimes it drops to 1800, 2300, 4500 or some sort of normal RPM, any ideas? WIN 7 ultimate 64bit ga-p55a-ud4p F14 BIOS Sapphire 6870 reference, default setting and BIOS, not the new released one Catalyst 10.12, nothing much changed except some 3D settings Here is some screen shots, please take a look at.