I find the CPU fans to be thermally controlled and under CPU control. When you first boot the usual system is to max out the CPU fan since the CPU, bios and such have not taken a temperature reading yet. After it gets going it throttles back the fan speed.
Sadly, no maker seems to document how this all works anymore.
Hi, I have a Q6600 quad core processor on a Gigabyte EP45-UD3LR board. When I first boot my PC up, the CPU fan will run for about 3-5 seconds then stop. I have looked at the setting in the BIOS and everything seems to be set correctly. Does anyone have any suggestions for me??