CPU Cooler

5 replies [Last post]
Joined: 06/22/2012
Posts: 1

I recently changed my CPU cooler from the STOCK AMD to a Noctua NH-U12DO. But when ever I restart my computer I get the error "System Fan failure Press F2 to continue" The Fan is working and the temperatures are good. Why am I getting this error and how can I fix it?

Its an HP computer.
Motherboard http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00647121&dlc=en

I know its an old system.

limeDk's picture
Joined: 04/22/2011
Posts: 124

maybe try install it in another Fan header or try run it on 12V molex

eire1274's picture
Joined: 09/12/2003
Posts: 1312

The fan doesn't signal like the stock AMD fan. This is true for many aftermarket fans. Don't worry, and disable the alert in the BIOS.

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spawnkiller's picture
Joined: 05/06/2012
Posts: 315

yeah or maybe you had the fan in PWM and the noctua only works on voltage so it's just a bios option ;)

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Joined: 01/15/2012
Posts: 208

i have had this problem before, just plug the stock fan back in, like eire said it doesn't signal like the stock AMD fan

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Manic Mouse
Manic Mouse's picture
Joined: 02/01/2007
Posts: 140


That Noctua cooler is using a 120mm fan. Those spin a lot slower than the standard AMD cooler fan.

There is a couple things you might want to check out.

Your motherboard bios may have its fan warning threshold set a little high - say about 600rpm. Try lowering it in bios to about 300rpm. All you really need to care about is that it is spinning at all.

Also some motherboards let you set various fan profiles like 'silent' standard' or 'performance'. If it is set to 'silent', the start up voltage may be too low start your fan spinning. Try changing the profile to 'standard' or 'performance'. Many 120mm fans are so quiet that even at full speed you don't really hear them too much.

Mark Baker

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