Has anyone ever tried using a Tube/pipe to funnel air from a 80-120mm onto your heat sink?

[joe4324]

I'm searching DESPERATELY to find a alternative to the infamous blacklabel delta fan. and I have a 120mm blowhole on my case and I noticed that the sound from the 120 (at least in my setup) is really fairly quiet, probably 2x as quiet as the delta (dont ask how! cause I dont know). I was thinking of building a funnel of some sorts and removing the heatsink fan all together and just using the funneled air to cool the HS, any of you wacko's tried this yet? and if so how did it work?

 

[Electric Amish]

Yeah, I did that, except the 120mm fan was exhaust instead of intake.

I found you needed a fan on the HS to reduce the back pressure. There was almost a 10°C decrease in temps when I added the fan to the HS as well as the 120mm. Both fans were sucking air through the HS and out of the case.

Here are some pics, without the HS fan.

amish

 

[MikeSFL]

My neighbor has an HP with a 1.2Ghz Athlon (Tbird I think) that has a similar setup. Only it's using a fan on the HS and on the case. They're both 60mm and pretty quiet. It looks like the case fan sucks air from outside into a metal tube (squarish kinda tube) that gets directed immediately over the HS/fan on the CPU and then that fan also blows down over the HS and the other case fans are exhaust. I might be wrong on that, but I'm pretty sure that's the sequence.

Mike

 

[joe4324]

Been thinking... what about using a 120 on the top of my case as the Exhaust for the hot air off the cpu. it would pull air through the HS (using a tube) and spit it outside the case keeping everything else cool. I would need to keep the ambient case temp down fairly low to keep the air rushing to the HS cool. although that would be alot easier without all the hot air form the cpu

 

[joe4324]

Amish, you found that you still needed a fan on the HS suckair through it as well as the 120mm? did hte 120 have to fight to hard to pull the air through? what size fan do you recomend on the HS, I'm using a Swiftech MCX370-0a HS and because of its rounded pin design I was thinking that i could probably get away without having to use a fan on the HS at all. but I will admit a 120 pulling through ONLY the HS itself would be demanding alot of airflow out of a SMALL space

 

[Electric Amish]

Yeah, whatever the problem was, by adding the 60mm fan back to the Alpha PAL6035 HS that's shown there decreased my temps by 10 degrees.

Talking with a friend that is a technical nut, he confirmed that throttling down the 120mm x 120mm fan to 70mm x 70mm was causing too much back pressure.

amish