CPU fan - blow in or out?

[kremington]

Hi,
I have a new GlobalWin FOP38 sitting atop my T-bird 1.2 (Type C), and just discovered that it was packaged w/ the fan blowing in towards the HS/CPU. I'm not a physics expert, but based what little I know about conduction/convection, it seems to me that it would make better sense to arrange the fan to blow away from the HS/CPU, therebye drawing cooler ambient air over the HS fins and way from the CPU. Anybody have thoughts about this? Thanks!

Keith

 

[peteb]

I have read mixed views on this and it may just be down to what you see works best.

I'm sure some fans/hs work better as push and some as pull.

For my Swiftech I found it to be very noisy in 'suck' mode, but better in 'blow' mode.

I have not compared cooling abilities, but since I don't have a problem with heat, I wanted quieter option...

-* This Space For Rent *-
email for application details

 

[HolyGrenade]

I think its better blowing air in as more heat is dissapated from the base of the heatsink. When Blowing air out, that area does not get as much air.


<i><b><font color=red>"2 is not equal to 3, not even for large values of 2"</font color=red></b></i>

 

[ejsmith2]

Try it both ways, and whichever gets you the best results use it. I expect, on the 38, you'll get best results by blowing toward the base of the heatsink. If you have poor case ventilation (or a peltier), you'll most likely get best results blowing away from the heatsink.

 

[Bombastik]

Hey why didn't anyone reply to my "Cooling considerations" post?? It's the same question 😉

Anyway as i see it, it SHOULD perform better sucking air IFF you have a good case cooling with a goog intake->outlet airflow


Read my post whydont'cha?