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Cooler orientation.

post #1 of 8
Thread Starter 
Does it make a difference which way you mount the CPU cooler? would one way be better then the other since heat rises?

Say you have a fan on the top of your case, would having it so the cooler pulls/pushs air through the heatsink and out towards the top fan be better then having it pull/push air out towards the rear fan? im just wondering since heat rises if blowing the hot air up would increase performance of the cooler.
Also, would having the heatpipes horizontal make a difference?
    
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post #2 of 8
depends, does your top fan move more air than your rear fan?
post #3 of 8
Thread Starter 
well top fan is a 200mm, rear is a 120mm. both anter 900 stock case fans, with 3 way settings.
    
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post #4 of 8
heat pipes work better when the coolant doesn't have to fight gravity... there have been arguments against this idea due to the wick being moist and not wet and thereby the convection not as susceptible to the effects of gravity, however actual tests have shown it to be an issue. cheaper/lower grade heat sinks seem to suffer from the effects of gravity more than normal...
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by LiNERROR View Post
heat pipes work better when the coolant doesn't have to fight gravity... there have been arguments against this idea due to the wick being moist and not wet and thereby the convection not as susceptible to the effects of gravity, however actual tests have shown it to be an issue. cheaper/lower grade heat sinks seem to suffer from the effects of gravity more than normal...
so...... yes? having it with the heatpipes horizontal blowing air out the top will make a difference? even if only by a few degrees?
    
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post #6 of 8
Antec 900? I'd direct the hot air toward the rear 120mm exhaust since it's in-line and close.
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post #7 of 8
Quote:
Originally Posted by LiNERROR View Post
heat pipes work better when the coolant doesn't have to fight gravity... there have been arguments against this idea due to the wick being moist and not wet and thereby the convection not as susceptible to the effects of gravity, however actual tests have shown it to be an issue. cheaper/lower grade heat sinks seem to suffer from the effects of gravity more than normal...
I can confirm this from first hand experience. I tried putting an accelero S1 rev 2 cooler on my 6870. Due to the orientation of my motherboard in my FT02 case my graphics card is vertical. This made the 4 heatpipes on the S1 Rev 2 cooler fight gravity to different degrees. The top 2 heat pipes were assisted by gravity and conducted the heat very well. The top heatpipe (the most assisted by gravity) was actually almost too hot to touch (a good thing) when I was running furmark stress test. The bottom heatpipe remained almost room temperature during furmark. It was obvious that the top heatpipe was conducting tons of heat while the bottom one wasn't doing jack...

So yes, orientation does influence heatpipe performance. Although it probably doesn't make a huge difference for a CPU cooler since the height difference will probably only be an inch or two.
    
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post #8 of 8
I think your airflow will benefit from a orientation facing the back. With air coming in the front 2 fans, going through the cooler, and out the back should keep everything more streamlined as the airflow never has to change directions.

Thats how I have it set up in my case at least...
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