CPU fan header

Sultan of Swing · 18 Oct 2008 at 02:12

On my P5Q-E the fan attached to the CPU heatsink is a 3 pin, not 4 pin, so I have it plugged into a 3 pin header on the mobo. When I start up the system is tells me there isn't a CPU fan, so I'll have to press f1 at each startup. Should the 3 pin fan work in the 4 pin header, or is there a way of bypassing the reminder at startup? Thanks.

Sultan of Swing · 18 Oct 2008 at 02:31

Ah good, thanks for that.

Sultan of Swing · 20 Oct 2008 at 00:47

ANDARIAL said:
you should be able to connect the 3pin connector to the 4 pin header on your mobo as the locating lug on the 4 pin header is offset for this purpose to be backwards compatible with 3 pin fans

Tried that after looking in the manual at the pin descriptions, but the fan didn't move.

Found the BIOS setting I needed, had to change CPU Fan Speed from [N/A] to [Ignored]. (In case anyone wanted to know)

Sultan of Swing · 20 Oct 2008 at 20:21

PhillyDee said:
It should still 'see' the fan though. Have you set the fan control to voltage instead of PWM?

I don't know how to do that, so I highly doubt it. It could be that it decided the CPU wasn't hot enough, I guess, and I'm still waiting on Vista to come through the post. I don't think I'll worry about putting it on the CPU header, as the motherboard uses QFan on the chassis headers too, and I've got a second CPU fan running as well--cooling should be fine.

Sultan of Swing · 22 Oct 2008 at 16:55

I don't know about any differences between chassis and cpu q-fan. I also can't see any options in the bios for shutdown temps, so I assume Asus automatically set it.

Sultan of Swing · 22 Oct 2008 at 17:06

Maybe it's the fan then--a Noctua P12.