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Blow or suck

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OnDborder

Senior Member
Joined
May 6, 2001
Location
HOT 'n Arizona
I have just received a Swiftech MC-370 with the Delta fan. Is the direction of the fan supposed to be towards or away from heatsink?
Thanks
 

TranceBear

Big Daddy Bear Senior
Joined
May 16, 2001
Location
Denver, CO
OnDborder (Jun 22, 2001 12:12 a.m.):
I have just received a Swiftech MC-370 with the Delta fan. Is the direction of the fan supposed to be towards or away from heatsink?
Thanks

blows down on the heatsink to dissapate heat from the heatsink, hope it helps.
 
E

ebola

Guest
it depends. if i set mine to blow onto the heatsink, my cpu would melt because i would be pulling in the heat from my hard drives and ram. i have my delta sucking heat away.
 

cjtune

Member
Joined
Dec 18, 2000
Just make sure you have proper casing ventilation -otherwise it won't matter whether you suck or blow or how big *** a HSF is.
 

samuknow

Member
Joined
Feb 19, 2001
Location
Indianapolis, IN
cjtune (Jun 22, 2001 01:11 p.m.):
Just make sure you have proper casing ventilation -otherwise it won't matter whether you suck or blow or how big *** a HSF is.

cjtune is right. It depends on your case and the airflow through it. Try both. Keep a close eye on the temps. Just compare idle and load. I am using twin fans blowing on my HS and at full load it won't get over 39C. It drops back to 26 within seconds after the load is removed. This worked best for my setup.

Let us know how it goes.....
 

Spewn

Registered
Joined
May 1, 2001
As long as you have good ventilation, you want to blow down on the heatsink. If the fan is sucking, it's gonna grab air from where it takes the least amount of effort, and unfortunately this tactic will draw nearly NO air accross the center of the heatsink! Hopefully you can see why this is bad, seeing as that's where most of the heat will be. Now, This isn't the case for some heatsinks(alpha's come to mind). If the fan is blowing from the side, and has a shroud, then sucking or blowing, it shouldn't matter. But as long as you're blowing down directly onto the core, blowing is your best bet.