PSU fan not spinning new build.

jcom · Jul 5, 2014

Hi all,

I just finished building my rig and it seems to turn on, but the psu fan is not spinning.

Here's a picture with the PC running.
http://imgur.com/QIrNMn8
You can see the radiator fans spinning and the psu fan is stationary.

Here is my build if it helps.
http://pcpartpicker.com/user/jcomiskey/saved/dt848d

Thanks in advance.

ksham · Jul 5, 2014

That's normal. It's an Eco feature built into the power supply. The fan won't spin until you are using high enough power consumption.

Edit: Corsair calls it the Zero RPM Fan Mode. Same thing.

prit87 · Jul 5, 2014

jcom :

you have nothing to worry .....
Fanless Mode means just that; the fan blades are completely stationary. There is no audible PSU noise in Fanless Mode, which is active when PSU output is below 20% of the rated DC output load. This completely silent mode is feasible due to the extremely high efficiency of these PSUs.

Quiet Mode runs the cooling fan at very low RPM, which results in extremely low level audible noise. The noise level is <16dBA, and is active when PSU output is between 20% and 50% of the rated DC output load.

In Cooling Mode, the fan speed and the associated airflow is adjusted to optimize thermal performance. This mode is based upon DC loading and ambient temperature conditions, resulting in the most effective and accurate cooling performance under heavier loading. Cooling Mode is active when the PSU output is above 50% of the rated DC output load.

jcom · Jul 5, 2014

Didn't even realize it had this function. Thanks.

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PSU fan not spinning new build.

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