Semi-Fanless PSU, up or down?

[Dave Waterman]

Hello hope you are doing well today..

So I ordered a seasonic platinum 760W which I want to set in hybrid mode for ultra quiet computing. Its going to be mounted in the bottom of my case with a dust filter, but since it will be semi-fanless, should it be mounted with the fan facing up or down?
When the fan is off, it would be better to have it facing up so he air can passively raise up.
But when its mounted facing down, the heat will raise up against the bottom of the psu...

Should i just mount it with the fan facing down?

THANKS

 

[getochkn]

most psu's only let you mount them 1 way as the screw holes and the case only line up 1 wqay.

 

[HiTechObsessed]

most psu's only let you mount them 1 way as the screw holes and the case only line up 1 wqay.

The PSU doesn't specify or care what way you put it, it's the case that decides. and most new cases allow you to mount it however you want (unless the mounting position is up top)

Leave it facing down. The heat generated will still force the warm out horizontally out of the PSU, looking to rise, and when the fan does turn on at load, you'll be getting cool air in as opposed to fighting the GPU for warmer air.

 

[dottorrent]

If your case has the PSU mount on the bottom, put the PSU fan side up. Since the PSU's fan won't activate until a certain load or temperature, heat will rise naturally. If the heat has nowhere to go and it warms up, the fan will activate. This is just a safety precaution but it is your decision.

Fan side down will isolate the air and give the PSU fresh air to intake, though does sacrifice some cable length.
Fan side up will exhaust hot air out the PSU, increasing cooling to other components, but increases temperature in the PSU itself.

 

[HiTechObsessed]

You want the PSU taking in cool air from the outside - always. Unless you have no other exhaust fans. The warm air will not get trapped in the PSU with the fan down, it will naturally move horizontally outward from the PSU. When the fan does activate, you don't want it fighting against the GPU for air. It's best to isolate the airflow for the PSU.

 

[Dave Waterman]

most psu's only let you mount them 1 way as the screw holes and the case only line up 1 wqay.

My case happens to have 8 holes 😛. Cant wait for my psu.