Power supply air flow

[mickyching]

Hi to all,

I'm considering moving the PSU to the bottom of the case I'm building, but I'm not sure there is enough space for proper air intake.

It draws with a 140-mm fan, and there will be a gap along the bottom of the case about 1/8" high, figure a total of about 40 inches in length on this gap, for a total of about 5 square inches of inlet space.

Two questions: Will this be enough inlet space to allow proper air flow for the PSU? Assuming it IS enough space, will the narrow constriction make it sound like a wind tunnel?

I can make the gap wider if needed, but I wanted to get some input from those with more knowledge of air flow than I.

Thanks!!

[jmcslob]

Originally Posted by mickyching

Hi to all,

I'm considering moving the PSU to the bottom of the case I'm building, but I'm not sure there is enough space for proper air intake.

It draws with a 140-mm fan, and there will be a gap along the bottom of the case about 1/8" high, figure a total of about 40 inches in length on this gap, for a total of about 5 square inches of inlet space.

Two questions: Will this be enough inlet space to allow proper air flow for the PSU? Assuming it IS enough space, will the narrow constriction make it sound like a wind tunnel?

I can make the gap wider if needed, but I wanted to get some input from those with more knowledge of air flow than I.

Thanks!!

I think you need to get that gap to about 1/2" if possible that's where my case is and you can slightly hear a wind tunnel effect

[twicksisted]

if youre worried about the bottom facing fan not getting enough air...why not have the psu at the bottom but with the fan facing upwards?... that way you get extra cooling on your gfx cards as the psu draws air in from that area and out the back of the case

[BraveSoul]

Originally Posted by twicksisted

if youre worried about the bottom facing fan not getting enough air...why not have the psu at the bottom but with the fan facing upwards?... that way you get extra cooling on your gfx cards as the psu draws air in from that area and out the back of the case

just how mine is, fan facing upwards try not to drop anything in it