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Save some watts by getting rid of redundant fans?

post #1 of 5
Thread Starter 
k guys so there's a fan in the back of my case (HAF 932) that shoots air out. Inside the case I have my heatsink which has no less than TWO fans sending air out in the same direction.

I removed the case fan cause I thought it was redundant and maybe even detrimental cause it could be blocking the air flow from the heatsink fans.

What do you air cooling heads think?

pic for details. green = heatsink; red = redundant fan, Xs = fans, O = hole in back of case; -> = direction of air flow


Edited by cuad - 1/23/11 at 11:32pm
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post #2 of 5
unless you have a pull fan on your heatsink, i would keep the case fan. and even if you did have a pull fan, i recommend cutting out the rear fan grill if you are going to remove that exhaust fan. that way you get more aireflow through the exhaust port.
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by AliceInChains View Post
unless you have a pull fan on your heatsink, i would keep the case fan. and even if you did have a pull fan, i recommend cutting out the rear fan grill if you are going to remove that exhaust fan. that way you get more aireflow through the exhaust port.
I like the idea of removing the rear grill ty. The big reason I want to get rid of that fan is cause I'm worried about how much watts I use with my 650w PSU, cause I have crossfire.

I want my future overclocks to be stable.
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post #4 of 5
Without testing your setup it's a hard call, but in the same situation as you I took a different solution: I removed the second heatsink fan (between the heatsink and the case fan) for two reasons:
*the CPU heatsink has widely spaced fins, so a push/pull isn't helping a lot (there is a 2-3°C temp delta though)
*although there is a way for the air to exit, with the case fan removed nothing is forcing the air out; thus a warm air pocket may form just above the VRM.

In my testing I found the CPU temp around 1°C worse for my setup (if that) and 4-5°C better temp for VRM. Try it too, you may notice the same pattern. The only thing is the fan on the case should have at least the same CFM as the first CPU fan.
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post #5 of 5
Thread Starter 
Gosh that is an interesting solution as well. I was so proud when I finally figured out how to set up my heatsink fans right (long story) that I completely overlooked that option. I think my previous instability came from a poor installation of windows. I did "chkdsk /f" in the command prompt so hopefully that helped. cause like the guys in the PSU forum said, my PSU should be able to handle my rig. We'll find out when I get new RAM tomorrow and try to overclock.
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