Poll: HSF push or pull?

[WackyComputer]

Hi all,

Does your HSF push the cool air on your CPU, or does it pull the hot air off?

Please post your reasons for doing so.

[Drake]

Pushing makes more sense, as with pulling you can take air from areas that don't get hot, whereas with pushing you force air down onto the HSF.

[MrP]

i push air onto the heat sinke, always have done.

i belive there are a few that benefit from this, but its really a case of trying it yourself and see what difference it makes

toodle pip

[spldart]

When I was air OCing and running aftermarket HSF I had made a duct to draw cool air in from outside the case through the side case fan and direct it over the HS's built in fan.

[WackyComputer]

Thanks,

I guess I better turn my fans around.

[foment]

yeah before water came into my life, I was using an alpha pal 8045 and thermalright slk 800....fans pushing air into the hs always produced temps 2 or 3C less compared to pulling air in my setup.

[WackyComputer]

spldart,

I saw this duct at www.cyberguys.com that is why I asked my question.:)
http://www.cyberguys.com/IMAGES/p4382A.JPG

[spldart]

Mine was homemade but same exact idea :) It helped me a few degrees C as well.

[4.6POWER]

I noticed a 1degree difference in favor of push :)

[foment]

Originally posted by spldart
Mine was homemade but same exact idea :) It helped me a few degrees C as well.

wow so that duct thing actually works?

[spldart]

Sure...Passing outside air over the heatsink fresh instead of the already somewhat warmed air inside the case does help :cool3:

[lechumbl]

Hi Wacky,

Two trains of thought:
(1) Pull in cold air over the rad, and the rad is cooled.
(2) Push warm air over the rad, and the air is cooled also.

Look at it this way:
When the air is pulled over the rad, the air is cooler than the air in the case. But, after the air is pulled over the rad, it is then warmer. The warmer air is in the case, which will warm the inside of the case. The CPU and all components are warmer, because you are putting warm air on them.

When you pull the air over the rad, you are using warm air from the case, and the cooling of the rad is less because the air is warm, that you are using to cool the rad with.

My point, it really does not make much difference whether you pull or push the air over the rad, if the rad is mounted inside the case. Either way the air ends up being warm.

Solution: Maybe think of putting the rad outside of the case, at least the rad can get ambiant air temp on it. This is OK, unless the ambiant air temp is hot, as in the summer time, then we are all screwed anyway.

Take care......

[darksaint]

Originally posted by lechumbl
Hi Wacky,

Two trains of thought:
(1) Pull in cold air over the rad, and the rad is cooled.
(2) Push warm air over the rad, and the air is cooled also.

Look at it this way:
When the air is pulled over the rad, the air is cooler than the air in the case. But, after the air is pulled over the rad, it is then warmer. The warmer air is in the case, which will warm the inside of the case. The CPU and all components are warmer, because you are putting warm air on them.

When you pull the air over the rad, you are using warm air from the case, and the cooling of the rad is less because the air is warm, that you are using to cool the rad with.

My point, it really does not make much difference whether you pull or push the air over the rad, if the rad is mounted inside the case. Either way the air ends up being warm.

Solution: Maybe think of putting the rad outside of the case, at least the rad can get ambiant air temp on it. This is OK, unless the ambiant air temp is hot, as in the summer time, then we are all screwed anyway.

lol and that why vapor cooling needs to be cheaper.
Oh well give it 5-6 months and you will see a 20% decrease in price anyway.

Take care......

[Spazzonater]

I have mine pulling the air instead of pushing and it seams to be working. 38c