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Pastimes : Dream Machine ( Build your own PC )

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To: halfscot who wrote (4539)12/31/1998 3:13:00 PM
From: NickSE  Read Replies (1) of 14778
 
halfscot,

I tend to agree with Paul on case air flow and here's why.

heatsink-guide.com

Should the fan in an ATX case suck air out or blow air in?

According to the ATX specs, the power supply fan should blow air into the case, through the power supply towards the motherboard. The idea behind it was that this way, the CPU would be located directly in the airflow and would get along with a passive heatsink. However, as the power supply gets hot, too, the fan would blow warm air towards the CPU, which of course isn't a good idea. In addition, even with a PS fan blowing onto them, modern CPUs wouldn't get along with a passive heatsink anyways. So, many case manufacturers are ignoring the ATX specs and are shipping their cases with a PS fan that sucks air out, which IMHO is a good idea. If your PS fan blows air in, it might sometimes be beneficial to reverse the fan (you must reverse the entire fan, reversing polarity won't work and might even damage your fan).


Hope this helps,
Nick
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