Originally Posted By: RobbMiller
Thanks, I'll flip one of them so there is one in and one out.


If it was designed and built that way, I'd leave it as is.

There's a LOT more to this issue than just which way the fans blow.

Without a lot of definitive study plus having at least a good manometer and temperature measuring equipments plus knowledge of the subject and some rather considerable amount of good solid testing, there is no good way to prove out any of the conjectures in this thread.

A design in which both fans are blowing inward likely has an outlet somewhere and the whole thing was likely designed to work with a little bit higher than atmospheric pressure inside.

That wee bit of higher than atmospheric pressure translates to more mass in the stirred air, which, if designed dproperly, translates to more ability to transfer heat.

One thing, though is certain: STIRRED AIR, in either direction, is going to cool better than static can.

One should also consider the age of the puter in question, and whether or not it is still under any warranties, reversing one of the fans *might* be a warranty-killer.

Second-guessing engineers seems to be running rampant these days, something that is often treated as a one-input problem, no less. There are very few one-input problems in this life.


--Mac

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