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[Solved] Power Supply Normal Fan Speed

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - [Solved] Power Supply Normal Fan Speed

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Best answer from sminlal.

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templetonpeck   09-07-2009 at 06:51:01 AM

What is the normal fan speed for a PSU? (I know it will vary by model, but approximately what range?)

It's a 550W PSU.

I fired up PC Probe II for my Asus mobo and it gave me a warning saying it was only doing 41 RPM.

However, I can feel it pushing some air back there, about the same (or relatively close to it) as the case fan below it, which is spinning well well over that into thousands of RPM according to the probe.

So what is the deal, just an inaccurate reading?

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Best answer from sminlal
PSUs with variable speed fans can operate with the fan stopped if the load is light enough. The "normal" fan speed depends entirely on the load - as long as the PSU doesn't overheat it should be fine.

I had the BIOS warning about low fan speeds and solved the problem by disabling it.
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XD_dued   09-07-2009 at 06:54:46 AM

Does it feel hot to touch? Probably just inaccurate.

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sminlal   09-07-2009 at 06:59:35 AM
Best answer

PSUs with variable speed fans can operate with the fan stopped if the load is light enough. The "normal" fan speed depends entirely on the load - as long as the PSU doesn't overheat it should be fine.

I had the BIOS warning about low fan speeds and solved the problem by disabling it.

Reply to sminlal
templetonpeck   09-07-2009 at 07:15:01 AM

It's not hot at all. Feels cool, same with the air coming out.

Message quoted 1 times
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505090   09-07-2009 at 09:01:35 AM

templetonpeck wrote :

It's not hot at all. Feels cool, same with the air coming out.



no worries then

as stated psu's with variable fans will slow down when they aren't needed

------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
 Reply to 505090
Andy2008   09-07-2009 at 06:01:53 PM

I take it your PSU does actually have a fan speed sensor attached to the motherboard? Otherwise, the reading fom PC Probe II is not a reading of the fan speed.

At 41rpm, you would be able to see the individual fan blades as they rotate.

Andrew

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