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Pastimes : Dream Machine ( Build your own PC )

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To: halfscot who wrote (4539)	12/31/1998 3:02:00 PM
From: pae	Read Replies (1) of 14778

[convection] Halfscot, I think your unexpected higher temp may be due to 2 things: 1) Air drawn past the power supply has already cooled the power supply. 2) You have lost efficiency by fighting convection. Warm air rises, cool air falls. If you disabled both case fans (the power supply fan apparently counts as a case fan) you might notice a very slight natural convection - warmed air would rise out of the back rear of your InWin and cool air would flow into the low side and front vents (am assuming a Q500 though I don't really know). Not that I have any exclusive rights to "the" correct solution; I chose to flip (reverse the flow of) my Q500 power supply fan so that the power supply is cooled by air sucked from inside the case and blown thru the PS out the back. I left the low front fan blowing in. The idea was to work with as opposed to against the natural convection. I'll agree with you ahead of time that convection flow is likely trivial measured in air volume. But I would rather have those few percent working with me than against - 105% of fan throughput versus 95%. Good luck, Paul (300a running 466 @2.1v)

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