PSU fan running at high speed.

Tom Burns · Aug 3, 2013

I built a computer about 8 months ago and have recently noticed that the PSU fan is running at a very high speed. This happens as soon as i turn the computer on but the outside tempreature is not very hot.

I am wondering if my PSU is not sufficient for my build. My build includes;

Corsair CX 500 PSU
MSI Z77a-g43 MOBO
GTX 660 GPU

I would appreciate any help with this problem.

Thanks

Lord_Kitty · Aug 3, 2013

PSUs usually increase their fan speed with load, not temperature. You haven't given much to calculate your system's power usage (overclocking, number of fans...) but I'm assuming its around 400W, which is 80% of the PSUs capacity.

EDIT: I've read that the CX500 fan is controlled by temperature, but I can't find anything to confirm this.

Tom Burns · Aug 4, 2013

Lord_Kitty :

Thanks for your response.

I am using CPUID HWMonitor to look at my voltages and I have noticed that the +5V section under my motherboard is reading as 5.8v.

Do you think that this could be the reason for the fans running fast, and that the psu is giving to much voltage to that component?

thanks

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PSU fan running at high speed.

Tom Burns

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Tom Burns

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