Power Supply Up Or Down?

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Joined
18 Sep 2011
Posts
167
Hi,

A silly question i'm sure, but is it best to have the power supply fan facing up into the case or down onto the floor?

My power supply is an xfx 650w

Thanks
 
Mine has vents at the bottom to. I just think face down it has minimal air flow to it. But im not sure if its an exhaust fan or intsake fan
 
My fan is up.

Reason is even though I have vents in the bottom my tower sits on the floor and would suck up loads of dust
 
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