Solved Proper Computer case exhaust & intake air flow volume advice

June 20, 2012 at 02:33:41
Specs: Win 7 SP1 32-bit, Intel Quad Core i5-760 4GB Ram
How much air should exhaust in a mid-size computer case as well as a cool air blowing in?
Is there some standard ruling or measurement of how much hot air should fan out of the case or the amount of intake air in terms of "cfm"?

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June 20, 2012 at 03:23:59
✔ Best Answer
The amount of hot air needed to be exhausted is dependant on the amount of hot air generated.

All computers generate different amounts of hot air dependant on the work they are doing, the type of CPU it is using and the environmental conditions. Consequently such a figure would be meaningless and impossible to calculate.

The only information along those lines is hidden deep inside the particular specs issued by the CPU manufactures where it does have a lot to say about cooling.

But that only relates to temperatures and heat sinks but nothing about air flow because a CPU manufacture will have no idea of what motherboard or case their CPU is going to end up in.

Some fan manufactures do publish figures for their fans but make no differentiation between hot air and cold air as hot air expands so there will be a greater volume of hot air leaving the case than cooler entering it.

Generally speaking a 5 inch rear fan along with the PSU fan exhausting hot air at the rear is usually enough. I front intake fan is very rarely needed.


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June 20, 2012 at 03:51:13
Which is the Best Place to Install a Case Fan? - Part 2

+1 for Mr Moderator.

You know the real meaning of peace only if you have been through the war.

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