Changing direction of cpu fan...

[DarkMask]

I have a Volcano 6 CU+ heatsink with the standard 7000 rpm fan on it, which goes over a tbird 1.4 ghz. thats besides the point tho. i was wondering if changing the direction of the fan to blow on the processor would help me in cooling the processor better.

 

[eno]

I have a Sk6 with the fan blowing downwards onto the sink and it runs cool. Are different heatsinks designed to run air pulling away and air pushing onto the sink? Yeah I am wondering the same thing too DarkMask.

 

[Zim Hosein]

For most heatrsinks, the fan should blow onto the HS; there are a few models out there that suggest having the fan suck away from the HS, but the model numbers escape me at the time, I don't recall the Volcano 6 CU+ being a "suck" configuration. You could try your fan both ways and see what net's you a better result, hope this helps 🙂

 

[Drsignguy]

Here is a quote from Alpha............................


Which type of fan heat sink is better, "expulsion type" or "induction type"?
According to our tests, the induction type showed better results the the expulsion type. This is because we used an intake cover to draw air through the lower part of the heat sink for more heat dissipation from the lower part of the fins. However, if some other heat source is located near the heat sink, heated air would come into the heat sink and affect the thermal performance, so the choice must be made depending on the environment.


You can find the more info Here.😉

Docs Operations I PICS

 

[Duvie]

excellent quote....

I have an alpha 8942 with 80mm fan on my oc'd p4 ssytem and I tested both ways....By the way the lpha manual showed the fan pulling air from the HS...

Sucking off of HS (the way I have it)...temps were 1-2c higher but my system temps were 4-6c lower...yep that is right...The blowing method caused heated air to be scoured onto surface of mobo and onto the northbridge chip of the mobo. It likley heated my ram modules as well...It also put tremendous heat onto my radeon le 8500 and since most Le's suck and use substandard memory chips and lack some of the better cooling and HS overheating with these cards are a real likelihood.


I say test it yourself and look at the numbers...It is truly unique to each situation...My avc sunflower did better blowing onto it but that had to do with the shape and design of the HS.

 

[DivideBYZero]

I too have been thinking about changing my CAKII38 to suck rather than blow. My reasoning was this: I have an 80mm case fan just above the CAK on the back plane of my case(GW802) sucking out and an Enermax just above the CAK, also sucking.

So my problem is I have a bit of a vacuum with the CAK blowing down, as all three fans are fighting for air from the same space. If I reverse the fan then the hot exhaust air will be evacuated by the 50CFM case fan and the Enermax's 90mm lower fan, which is temp controlled.

Wadda reckon?