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Old December 16, 2007, 05:53 PM
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Default Air Cooling - Case pressure

I was wondering what affect pressure has on air cooling

Negative pressure, neutral and positive case pressure DOES Case pressure affect a systems temperature/cooling ability?

Matty
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Old December 16, 2007, 07:32 PM
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Quote:
Originally Posted by mattydies View Post
I was wondering what affect pressure has on air cooling

Negative pressure, neutral and positive case pressure DOES Case pressure affect a systems temperature/cooling ability?

Matty
positive pressure in the case will keep the dust out
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Old December 16, 2007, 09:01 PM
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Air is air is air. One way or another, you need it to enter the case, come in contact with the hot components, and then leave as quickly as possible. Generally speaking, this is best done with a near-equal balance of intake and exhaust fans, where the intake fans are aimed directly at the hot components, and the exhaust fans try to pull air directly away from those same components.

The dust prevention argument for positive pressure only applies if all the intake fans are properly filtered.

A common argument for negative pressure is the "scavenging" effect, where air is pulled from all the hidden corners that fans might not blow on directly. Nice, but the theory is dependent on there being holes/gaps in those hidden corners, through which air can be pulled in.
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Old December 18, 2007, 09:23 PM
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Well the Scavenging effect does sound nice, but I think my efforts would be better used for getting cold outside air directly to the hot components and then away quickly.


Thanks for the input
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Old December 18, 2007, 09:30 PM
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Quote:
Originally Posted by Krixxer View Post
positive pressure in the case will keep the dust out
Unless you aren't using filters, dust will get no matter if a case is setup for negative or positive air pressure.
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