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Is air flow short-circuitry always a bad idea? - Page 3

post #21 of 29
Quote:
Originally Posted by rdr09 View Post
maybe your cooler is acting as an exhaust fan blowing straight out to the perforated top of your case.
No. I have tested this with out any fans on my cooler(yes my cooler works great passive) and there is still air flowing out the back of the case. and I have blocked off the rearmost top fan mounting location. see when air enters the case, it has to escape, I have provided only one place for it to exit. that would be where the rear mount fan location is. the problem with using an exhaust fan is it can suck air in though crack's that you cant filter, like around the side pannel and such, this is why negitive pressure case's act like a baggless vacume.

Quote:
Originally Posted by rdr09 View Post
OP's point is shown in the figure attached. it is certainly doable but in the case of KhoacticKomputing an adapter is needed to position the cooler in the right direction.

the problem i see here is after gaming for a few hours, for example, the exhausted air (top fan) may be high enough that even when mixed with outside air (ambient) it will be sucked in by the intake fan right beside it making the setup inefficient. but without actual data it is just speculating.

in my case, i do not have enough room for fans at the top even the slim ones would not fit. i have a push/pull config.
What are you talking about? an adapter for what? I'll post a pic of my case and fan location's in a moment. it might clear some things up.
Edited by KhaoticKomputing - 8/22/11 at 7:14pm
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post #22 of 29
Quote:
Originally Posted by KhaoticKomputing View Post
No. I have tested this with out any fans on my cooler(yes my cooler works great passive) and there is still air flowing out the back of the case. and I have blocked off the rearmost top fan mounting location. see when air enters the case, it has to escape, I have provided only one place for it to exit. that would be where the rear mount fan location is. the problem with using an exhaust fan is it can suck air in though crack's that you cant filter, like around the side pannel and such, this is why negitive pressure case's act like a baggless vacume.



What are you talking about? an adapter for what? I'll post a pic of my case and fan location's in a moment. it might clear some things up.
my bad. so, you are exhausting to the rear. blocking the top would certainly help in your case.
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post #23 of 29
Another vote for no exhaust fans.
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post #24 of 29
I'd block the rearmost top fan, and use the other top as intake.
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post #25 of 29
Here is a pic.[IMG][/IMG]
The idea here is to have two "Zones" of air flow. one in the top, and one in the bottom. reason for this is hot air dose not rise when fans are used, that and GPU cards are large. Most of the time the GPU is is big enough that there are only an inch or two for air that intakes from the bottom of the case to move up to the top and make it to the CPU cooler, this is no good.
So we start of by adding an intake that can feed our CPU cooler cool fresh air from outside of the case. Removing the exhaust fan also helps remove dead spots aswell. there is enough air coming in that it has to escape and trust me it will find a way out.
The next zone is the bottom zone, this is for the GPU/PSU. I flipped my PSU "up side down" so that it intakes air from outside the case, and exhaust's it out the rear of the case, if your PSU is right side up it will be sucking hot air from the GPU in to the PSU, this is bad. Keeping the PSU from over heating will prolong life of said PSU. The next step to making the second zone effective is removing the PCI slot cover's, or replacing them with "mesh" or freeflow covers. Then we add a side intake fan, a front intake fan, and in my case I added one haging off the back of my HDD cage. this ensures there is plenty of cool fresh air moving over the GPU and allowing the GPU fan to pull that cool air over the GPU heatsink. by removing/replacing the PCI cover air can vent out the back of the case to remove any dead spots of heat.
I spent months trying out every combonation of fan placement I could come up with, then I asked around on here to get some more. With the help of Elume I came up with this set up. It has resulted in the best temps for my PC. My GPU/CPU are overclocked pretty well and I run the snot out of it on games for many many many hours at a time, and when I'm not running games my wife is running them my temps are pretty darn good IMO. I under stand your case may not be able to allow as many fans to be installed but this will give you an idea of where to start. I stongly suggest that you search the Air cooling section for Elume's threads on air cooling. He has spent countless hours testing and re-testing idea's for PC cooling and had posted ALL of it on here Best of luck to you! keep posting on what works for you case so we can forward this info to other people in your situation! Cheers man!
Edited by KhaoticKomputing - 8/22/11 at 7:41pm
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post #26 of 29
Thread Starter 
I really appreciate all these replies guys

Thanks a lot.
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post #27 of 29
kaotic has it about right, that is probably the best idea for airflow
   
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post #28 of 29
meh
I use delta fans, they pull and blow allover the place
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post #29 of 29
Quote:
Originally Posted by 3dfxvoodoo View Post
meh
I use delta fans, they pull and blow allover the place
I have San Ace 1011's
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