Actually the fan on the power supply blows out for a different
reason.  If the fan blew air into the case then it would pick
up all the heat from the power supply before it ever got to
the boards and chips.  So instead of bathing the chips with
cool air, they would be getting more heat added to the ambient
air.

I agree with Max's point about the case fan.  The power
supply fan blows out and the case fan should blow in --
unless they are mounted very close to each other.

Jim Meagher
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Micro Solutions Consulting     Member of The HTML Writers Guild
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> -----Original Message-----
> From: PCBUILD - Personal Computer Hardware discussion List
> [mailto:[log in to unmask]]On Behalf Of Max A. Lupton
> Sent: Tuesday, September 15, 1998 6:37 PM
>
> I believe most power supply fans blow out on the theory that the chips on
> the boards are more sensitive to heat than the regulators and
> rectifiers in
> the power supply (not to mention more expensive).
>
> If you can get the new fan on roughly the opposite corner of the case make
> it blow in so it will work in series with your present power supply fan
> creating a nice wind tunnel effect in the case.  Then you can get some
> TURBO stickers for your PC and you're all set ;-).
>

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