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CPU Fan only works in CPU_Fan2 with ASRock Z77 Ext.4, CM Hyper 212 EVO

Last response: in Motherboards
November 7, 2012 2:03:50 PM

Title explains it all, I've had this system running since July and haven't had any issues. Just this morning I noticed the fan stopped spinning (glass window on case), and I tried a few things--eventually plugged the fan into CPU_Fan2 (was initially plugged into CPU_Fan) and it works just fine.

Any ideas? Seems to definitely be an issue with the motherboard but maybe I'm mistaken! And is there anything wrong with running it through CPU_Fan2 or will it work the same?

a c 265 V Motherboard
a c 345 à CPUs
November 7, 2012 2:48:34 PM

I agree. It would seem that the cpufan1 has failed.
If you are still under warranty, I think I would try to rma the motherboard.

Otherwise, since fan2 seems to work ok, I see nothing wrong with continuing.

The presence of fan2 is a bit of news to me, but I think it is a nice feature to accomodate those cpu coolers with a push/pull dual fan configuration. A motherboard will not normally start if there is nothing attached to a cpu fan header.
a c 227 V Motherboard
a c 157 à CPUs
November 7, 2012 2:49:19 PM

Have you updated your BIOS lately? If so, it could be that your fan settings were reset in the BIOS to disable fan headers until the system exceeded a certain temperature. You might want to review (and adjust if needed) the fan settings in the BIOS.