Originally posted by: JEDIYoda
alot of hot air does not get trpped in the upper paret of the case unless you don`t have proper airlfow!!
The proper airflow should be from the bottom front of the cae to the upper rear back panel of the case.
With possibly a few intake fans along the3 way...say on the side panel as well as the upper top of the case....
It has been proven by several people on these and other forums that in actuality having an upper exhaust top fan makes no difference in your CPU temps.
Where it makes a diference supposedly is if your memory is over in that area and you over clock alot like I do and that fan is an intake fan.
A good 120 mm fan will be able to handle anything that is in your case that needs to be eshaust oriented!
But with that said.....I blocked my upper fan and instead I use this to blow air onto my memory--
http://i9.photobucket.com/albums/a72/JEDI_Yoda/005a.jpg
After doing extensive tests....thus is what worked.
Also by having an upper exhaust fan you will be mis directing the air from the bottom of the case away from the CPU......
My temps speak for themselves as to whether I know what I am doing.
Especially with the present p4 chip that I have and especially since I am currently overclocked to 3.8 with and idle of 27c and a 100% load temp of 39c.