Fan sucking or blowing on PAL8045?

[cnhoff]

Old question, new heatsink!

 

[FullRoast]

According to this article overclockers 8045 article you should have the fan blow in.

 

[Wind]

Default is suck air from HS.

 

[Animal -OCXL-]

Yeap, sucking is default, but I'd like someone to do some extensive tests.
When I receive my 1.4 266/Alpha 8045 w/Sunon, I'll try to do some testings, but its not confortable for me due to my crappy and unconfortable computer location :disgust:

 

[cnhoff]

I have installed my (wimpy) 27cfm sucking and I am getting about 49C full Seti@Home load on my TBird@1500@1.75V

 

[Jhhnn]

I didn't get that impression from the overclockers's article at all, FullRoast. Just that they trust their "blowing in" figures more, and that there might be slightly less noise that way with the Orix fan.

Alpha builds 'em to suck, let 'em suck.

 

[Jhhnn]

Double Post...

 

[FullRoast]

Jhhnn - You are correct. I read the review awhile ago and only skimmed it when I added the link. In that review, they did say that it is easier to measure the temperature of the heatsink when the fan is blowing in rather than blowing out. They did find that there was a "tad less performance" blowing in, but reduced noise.

I read another review (here) that said they got the basically the same results with the Alpha 8045 whether the fan was blowing in or sucking out, and that blowing in was quieter. I have a 92mm fan on mine, blowing in, but my goal was to shoot for quiet.

 

[Brian48]

Blowing in causes more resistance as the air smacks the bottom of the heatsink. This lowers the RPMs and brings the noise down. I've noticed this running my Delta either way on my Vantec.