error but no error on cpu fan?

adolf hamster · 19 Jun 2013 at 12:17

installed an alpenfohn k2 few days back, used corsair sp120's with pwm as opposed to the vanilla fans.

went to boot up today and got 'cpu fan error' message from the bios. thing is both cables are seated and both fans are spinning fine, ergo no error?

one fan is in the socket marked CPU_FAN and the other is in CPU_OPT

anyone care to shine a light on what's going on? if I deliberately bypass the message computer starts up and runs fine [i'm using it atm]

computer specs:
psu= corsair gs700
mobo= asus sabertooth 990fx [gen 1]
cpu= fx8150 @stock

mickyflinn · 19 Jun 2013 at 13:54

Not sure but you should be able to disable the cpu fan warning in the bios.

Tealc · 19 Jun 2013 at 16:28

Fans could be running below the warning threshold, which some board manufacturers set abnormally high. Have a look in the BIOS for the setting and reduce the threshold if possible.

adolf hamster · 19 Jun 2013 at 16:29

just got back from tech, no error this time. if it happens again i'll take another look. the only thing I can think is possibly it's not getting feedback for the fan rpm? would explain why It thinks there's something wrong when there isn't

edit: warning threshold for temps or rpm? i'll take a look

Hagar · 19 Jun 2013 at 16:32

Tealc said:
Fans could be running below the warning threshold, which some board manufacturers set abnormally high. Have a look in the BIOS for the setting and reduce the threshold if possible.

+1, asus has 600rpm as default I think. Some PWM fans have a lower start threshold until the CPU gets warmer. Set it to 300rpm in bios.

adolf hamster · 19 Jun 2013 at 16:43

tried changing the threshold, didn't help it. got the warning again went straight to the bios and the fans are reading anywhere from 0-6300 ish rpm, so it does seem to be that. disabled q fan control and set it to ignore the temps. its running full bore all the time now but tbh I can deal with that. its quiet enough

setter · 19 Jun 2013 at 17:44

Same cooler here and get the same error. As above, the threshold can be changed. Or you can set the fan warning to ignore which does away with the F1 message at boot. In bios under monitoring, with cpu q-fan enabled the cpu low speed limit menu will show up. From here you can select ignore, 200, 300, 400, 500 or 600 rpm.

Dillinja · 20 Jun 2013 at 15:31

I had the same fitting dark rock pro 2 from stock cooler...not surprised it chucked an error at me...stock cooler rolls about 1200 - 1300 rpm and the DRP 2 rolls at around 500 600 at idle what I done is just set ignore in bios on cpu fan, I do know with the sabertooth z77 all monitoring in windows was fine I still got a cpu fan speed so it seems it just stopped the error at boot

...ahhhh sorted...highly annoying not being able to bung ya pc on and walk away and come back to desktop....hhaaa mind u was an issue on old machine but fom boot to in windows is around 6-7 seconds on new machine anyway..