Blowing onto heatsink, or pulling air away?

[Sideswipe001]

I just got a SLK-800 to use with a Thermaltake Smart Case Fan 2 on a XP 1700+.

Do most of you have the fan blowing down onto the CPU, or pulling up away from it? I think that I'll have to have it suck air upwards, because I have a plastic enclosure with a fan blowing out positioned directly over top of my CPU.

Which way has everyone found to be more efficent?

 

[SWScorch]

heatsinks with fins are *usually* more effective having the fan blow into them. I'd say try it both ways, and see for yourself. With the setup you describe, the exhaust fan may help it if the HS fan is blowing out.

 

[BoomAM]

SLK-800s are designed for the air flow to be blown into the fins.

 

[lchyi]

Just from personal experience, when I installed my first 'non-stock' heatsink (the AX-478), I had the fan sucking air out of it like the Intel stock cooler does. Then I had okay temps, kind of high though, but I thought it was because the hs wasn't all that expensive and it wasn't copper either. Then I got a new Sunon fan and accidentally put it in the wrong way because it was missing the sticker, hehe it didn't blow more CFM but it dropped my temps about 3-4C instantly. Same with the SLK-800u, I have that one now and it has the same results putting it on two different ways.

 

[Need4Speed]

use the forum search....there is one thread right above this one, and a dozen more asking the same damn thing.

 

[eshtog]

Originally posted by: lchyi
Just from personal experience, when I installed my first 'non-stock' heatsink (the AX-478), I had the fan sucking air out of it like the Intel stock cooler does. Then I had okay temps, kind of high though, but I thought it was because the hs wasn't all that expensive and it wasn't copper either. Then I got a new Sunon fan and accidentally put it in the wrong way because it was missing the sticker, hehe it didn't blow more CFM but it dropped my temps about 3-4C instantly. Same with the SLK-800u, I have that one now and it has the same results putting it on two different ways.

the stock cooler for the intel 2.4c has air blowing away from the heatsink? should I switch it around?

 

[0roo0roo]

just try it.

that being said, do you think the engineers that aim it towards are tards?

 

[RalfHutter]

Originally posted by: ShotgunEd

Originally posted by: lchyi
Just from personal experience, when I installed my first 'non-stock' heatsink (the AX-478), I had the fan sucking air out of it like the Intel stock cooler does. Then I had okay temps, kind of high though, but I thought it was because the hs wasn't all that expensive and it wasn't copper either. Then I got a new Sunon fan and accidentally put it in the wrong way because it was missing the sticker, hehe it didn't blow more CFM but it dropped my temps about 3-4C instantly. Same with the SLK-800u, I have that one now and it has the same results putting it on two different ways.

the stock cooler for the intel 2.4c has air blowing away from the heatsink? should I switch it around?

The stock Intel fans blow towards the CPU. You could try it the other way (if the fan can actually even be turned around) and see how your temps compare, you've got nothing to lose except the time that it takes.

 

[lchyi]

Huh, funny, my stock cooler blows out... and I'm definitely not feeling the "leftover" wind from it blowing in and out.

 

[Corporate Thug]

this has been asked many times, it is far more effective to blow on it rather than have the fan displace hot air