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Power supply fan on the bottom?

Last response: in Components
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January 21, 2010 1:49:20 PM

I was looking to buy this CORSAIR 650TX:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The fan for it is on the bottom and my Antec 902 case (bottom mounted psu) doesn't have bottom vents. What is the intended airflow for this psu, intake or exhaust? And is it a good idea to get this for my case?
a c 243 ) Power supply
January 21, 2010 1:54:43 PM

vntg said:
What is the intended airflow for this psu, intake or exhaust? And is it a good idea to get this for my case?

Psu fans are intakes, they draw air into the psu and force it out the grill.
You can always mount the psu with the fan facing up.
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January 21, 2010 2:11:06 PM

Fan facing up sounds good to me. Any concerns you could think of? Such as screw positions, inefficient airflow?

I mean, was it better intended to suck in cold outside air through a bottom case vent and out the back? or help suck out the warm inside air (fan facing up)?
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a c 243 ) Power supply
January 21, 2010 2:18:12 PM

There's enough screw holes to mount the psu in either direction.
You would be facing the fan toward the open case instead of a case wall, you decide if there would be any airflow inefficiency :) 
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a b ) Power supply
January 21, 2010 2:47:57 PM

PSU fans and cooling systems are designed to take in internal case air, already somewhat pre-warmed, and assist with overall case cooling air flow.
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a c 144 ) Power supply
January 21, 2010 5:39:19 PM

I have 3 Antec 900 cases, all with PSU's mounted with the fans facing the inside of the case. I figure that it helps to remove the air that hte lower fan blows over the hard drives.

With the heaviest load I could think of on my quad core systems (three instances of Prime95 and one of 3DMarko5), the exhaust air (measured with an electronic cooing thermometer) on both is only about 3 C over ambient.
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