I don't get it, SpeedFan does not seem to work correctly on my Win 8 ACER desktop. Only if I disable "Smart Fan Control" in the BIOS, I can control the CPU fan. But if I disable this setting, my fans run at 100% on system startup. And according to the BIOS and SpeedFan, my system fan is not even running? And do I need a separate tool to control my Nvidia GPU fan?