Please see the image below for the correct attachment of the CPU fan and the rear fan.
I am using an online manual which may be slightly different layout from the one you have, so I can only give you the pages here for instructions.
I want to check setting in the BIOS before proceeding.
Restart computer and enter BIOS. find the relevant item by reading the user manual.
Please go to page P38 Mobo user manual, Thermal monitoring, set to Auto.
P41, PWM Phase Control,set to Auto.
Save settings and exit.
Wait for the computer to get to the windows screen.
Shut down and wait for the fans to stop.
Power on and see if the CPU fan is starting correctly. IF NOT.
Shut down.
Switch of the PSU.
Take anti static measures.
Remove the rear fan plug from the Sys-1 fan header.
Remove the CPU fan plug and attach to the Sys-1 fan header on the Mobo.
Turn on the PSU.
Power on and watch the CPU fan, does it start OK, it should run pretty fast.
Shut down.
Turn of the PSU,
Take anti static measures.
Replace the fan plugs to the correct fan header on the Mobo.
P43. PC Health status.
Edited by iammykyl, 26 September 2012 - 04:25 AM.