Can I plug my CPU fan into CPU_FAN_OPT?

[damonkashu]

after applying thermal paste and mounting my CPU fan, I discovered the power cord for it is too short to reach the CPU_FAN pins. However, it can reach the CPU_FAN_OPT pins, is it ok that I can plug into that one instead? Or does it have to be in CPU_FAN?

 

[Toxxyc]

It will work on the CPU_FAN_OPT header as well, there's no doubt about it. If it is a header supporting PWM fans, even better, otherwise it will just function like a normal case fan. The motherboard may require you to ignore CPU_FAN speeds in the BIOS though, or it will keep bugging you every time you switch on the PC, but that's easy to do and takes 5 minutes to complete.

 

[damonkashu]

yep, it seems the BIOS complains about a CPU fan error when I turn it on, not sure how to turn it off though...

 

[Toxxyc]

You'll find it in the BIOS somewhere, just keep searching. It should be where you can monitor system and CPU temperatures, and you can then choose the option to "Ignore" CPU_FAN speed or status.