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I have recently built a new pc with the following specs:

Intel i7 2600k 3.4Ghz
16GB memory
Asus Sabertooth P67 motherboard
Zotac GeForce GTX 550Ti graphix card
OCZ Agility 3 128GB SSD
2TB 7200 RPM Segate HD
Windows 7 64-bit 

I have successfully overclocked the cpu to 4.7Ghz. The issue is that when I start the computer from a cold boot (where the computer is turned off for more than 2 hours), I get a CPU fan error when the pc is first booting up (before windows loads up). The fan is working. Then if I reboot the pc any number of times, I will not get the error. It only happens on the initial boot.

Any ideas how I can resolve it? Is there a issue with the motherboard?

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Check the BIOS settings for the fan monitoring. Most likely, it's set too high and the fan isn't quite spinning that fast when the BIOS checks it. Did you 100% confirm that the CPU isn't throttling under load? (If it's throttling, the overclock was not successful and will make the computer slower!) –  David Schwartz Apr 21 '12 at 2:21
    
I left the fan settings to default which is 600 rpm. I looked at the specs for the fan & the RPM for the fan is between 600 & 2000. I bios complains only when the rpm goes under 600. Sorry for the n00b question but how would I know if the CPU is throttling? –  KO. Apr 21 '12 at 20:20

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