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Fanless cooling

post #1 of 17
Thread Starter 
already asked this in the amd cpu forum but i figured i might get more help here.
i'm building a computer for my mom using parts i have laying around. i'm going to be buying a new cpu for myself and giving her my 955 be c2 chip ( runs too hot to over clock well ). i have a cooler master tx3 laying around but i cant find the clips to hold the fan onto it. the case im using will have two 80mm fans , one pushing air in right on top of the cooler on the side panel and then another 80mm exhaust in the back of the case pushing out right next to the cooler then the psu on top.

i guess my question is even though the tx3 is not designed for no fans will this be sufficient cooling for this chip if i undervolt it and with the small amount of flow in the case? this thing will never be pushed to 100% load ever.
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post #2 of 17
Never put no fans on a CPU cooler.
    
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post #3 of 17
It'd be highly recommended to use a fan on the CPU cooler. The fins on the heatsink likely won't let air from case fan flow into the cooler, thus reducing performance drastically. You should be able to use some paperclips or something to attach the fan, with a little wiggling and experimentation. Then you'll want at least an intake fan in front to keep the air moving. That would be bare minimum and seeing how it won't be pushed too hard, it should suffice. If you're able to use both 80mm fans, put one as intake in the front, and one as exhaust in the back. That would do alright, theoretically.

Make sure you figure out a way to put a fan on that CPU cooler. Otherwise the resistance from the fins will likely cause any air flow to just go around it, rather than through it.
post #4 of 17
Thread Starter 
damn. alright. this case wont allow for a front intake fan though.
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post #5 of 17
Dell does it with some of their computers. They just have an intake fan in the front and then ducting to the heatsink. So if you made some ducting from the intake fan to the heatsink I think you could get away with it.
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post #6 of 17
By the way, why not making some ghetto CPU fan clips with zipties? It works really well and costs a crap and less.
   
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post #7 of 17
Quote:
Originally Posted by janz3n View Post
damn. alright. this case wont allow for a front intake fan though.
Well, I've seen plenty of crappy mass manufactured computers with only an exhaust. If you really must, a side intake will do alright. Something's better than nothing, in most situations. If you could post a pic of the case, it'd be easier to make recommendations on case fans.
post #8 of 17
Thread Starter 






iphone pictures, sorry.
Edited by janz3n - 3/5/11 at 2:14pm
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500GiG Caviar Black raid 0 lg dvd burner windows 7 ultimate 23" samsung & 37" samsung tv 
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post #9 of 17
Hmmmm.... You might actually see better results without that side fan. It appears the exhaust fan will just take any air blown in by a side intake and blow it straight out. Stupid design... Another option would be to put an 80mm in the 5.25" bay, but that involves ghetto rigging and all that crazy business. Tough call overall.
post #10 of 17
http://www.axiontech.com/prdt.php?item=93137

Thermalright made a fanless CPU cooler that was almost as good as a TRUE. In fact adding a fan didn't really improve the cooling much. The only draw backs are it is big, expensive and would work best in a case with good airflow.

This heatsink works better than most fan cooled heatsinks in the $30-$40 range, but of course it is twice the price.

So despite being a heatsink with no fans, it works quite well.

However I would advise against using CPU coolers intended to be actively cooled without fans.
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