should my cpu fan blow on the heatsink or away?

gplracer

Golden Member
Jun 4, 2000
1,750
16
81
Any results out there to tell me about. I have an alpha pal 6035 and an adda 28.3 cfm fan.
 

JayPatel

Diamond Member
Jun 14, 2000
4,488
0
0
you want the air to flow onto your heatsink as well as suck it away. contradictory eh??? you want cool air to blow onto the heatsink to dissipate the heat off the sink, but also you then dont want the heated air to be blown back onto the heatsink thru bad airflow.
 

Mikewarrior2

Diamond Member
Oct 20, 1999
7,132
0
0
JayPatel,

Alpha's are designed to pull(suck) cool air through the heatsink, not blow cool air onto them. It is based on how they designed the heatsink shrouds(and heatsinks) to control/direct airflow.


Mike
 

nedesto

Junior Member
Oct 30, 2000
9
0
0
can be affected by airflow in your case, particularly if there are any obstructions (e.g. powersupply) near the socket. i have a similar setup
to yours in an antec ks282 case (no obstructions) and found that setting the alpha to "suck" was about 4 degrees C cooler than "blow". alpha says
it should be set to "suck" but 3dfxcool (who i bought my alpha from) says it should "blow".
 

Berkut

Member
Oct 24, 2000
64
0
0
I have the Fong Kai case with the CPU shroud.

With the back fan blowing out, and the CPU fan blowing onto the CPU, it seemed like theyw ere working at cross-purpose.

I removed the shroud, but left the fans blowing in the same direction. Now I am wondering if I should turn the fan around on my Tysol HSF.

Jeff Heidman
 

York1

Senior member
Oct 9, 1999
552
0
0
Well after reading this post I decided to flip one of the fans around on my Dual System
Ive been using Identical Alphas on both CPUs Both fans were sucking Before The 2nd CPU was always 3 degrees or so hotter I flipped the fan to blow on the @nd CPU and now it runs 3-4 degrees cooler than the 1st CPU.Guess Ill flip the other one around now and see how it goes
 

Mikewarrior2

Diamond Member
Oct 20, 1999
7,132
0
0
Its harder to cool dual cpus with both fans going in the same direction(in hte case of alpha's) because you get the air mixing. If you have good, directed intake, this wouldn't be a problem, but for most cases, it may be a problem.


Mike
 

York1

Senior member
Oct 9, 1999
552
0
0
Well Ive got a Addtronics W8500 with all the fans I turned the 2nd fan around and it also dropped a couple degrees Either way Im happy
 
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