CPU Fan failing warning on cold bootup

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I have just replaced my CPU cooler fan, which is connected to the CPU_FAN 4 pin connection on my motherboard, Gigabyte Gamer G3.

When I boot the system up after switch off, for about 2-3 seconds I receive a fan warning sound, and then the system boots up fine. If I reboot the PC, I do not receive any warnings.

I have monitored the PC on cold boot up and the fans all startup as normal, but I still receive this error sounds. Any ideas?

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Are you able to see any section dedicated to fan monitoring in the Gigabyte UEFI motherboard setup program?

HWiNFO64 (www.hwinfo.com) may be able to read your fans sensors after booting so you can see if the CPU cooler fan RPM is up to specification.

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TechTango

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The fan failure warning is triggered when the RPM of the fan is below a certain threshold. My guess is that the warning is triggered when the fan is spinning up from a dead stop on a cold boot. During a warm boot, the fan never spins down all the way, so it doesn’t have that short period where it is below the threshold. If the fan has a slower maximum speed than the old one, this could well be the issue.

Can you go into the UEFI settings and see what the fan speed threshold is, and also what the actual recorded fan speed is at that point? My Asus motherboard lets me set the threshold, and it also reports the realtime fan speed. There have been times when it triggered the fan warning, but I went into the UEFI and saw that the fan was just below the threshold, which means it was actually working fine.

As long as the CPU is not overheating, you’re good… the warning is to let you know that a fan has failed, which will cause high temperatures under load. A fan being below an arbitrary RPM threshold when the temps are good is not harmful in and of itself. Pretty much every laptop turns off the fan(s) when the temps are good in order to save battery power and keep it quiet, and most of them will have the fan(s) off much of the time they are being used. Passive cooling (the cooler still works without fan-forced airflow) is enough to keep temps in the “good” range under low load conditions.

 

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woodm wrote:

I have just replaced my CPU cooler fan

Why did you replace the previous CPU fan?

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