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Case airflow

post #1 of 11
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So currently I am in the mood of re-building my whole pc again in order to clean it and better cable management. I was wondering if this is the best airflow cooling I can do with my Fractal Design Define R3.

There is a total of seven fans, two of them are for outtake and five for intake.
This is how I currently have them set up.

19pe28.jpg

Red - Outtake
Green - Intake
Gold - GPU Air Direction
Blue - CPU Fan Direction

I plan on removing half of the hard drive tray to get better cooling. I was thinking I should make the bottom fan next to the psu outtake as well, what do you fellas think?
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post #2 of 11
What if you took that intake on the top and turned it to exhaust, you will then have two fans on top and one on the back venting the hot air. Also since heat rises it should be more efficient and you should have less "trapped air"
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post #3 of 11
Honestly, I'd turn both top into an exhaust...having the two alternating ones at the top is just going to cause a cycle of warm air.
 
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post #4 of 11
I would make both top intake and have the rear as the only exhaust. As long as you have positive pressure and the airflow is from the front to back you should be good. The bottom fan is kinda useless, I added one in mine and it didn't do anything. You're probably better off adding one between the front two intakes and the GPU to bring cool air into your GPU. Just my .02 thumb.gif
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post #5 of 11
Quote:
Originally Posted by JTHMfreak View Post

What if you took that intake on the top and turned it to exhaust, you will then have two fans on top and one on the back venting the hot air. Also since heat rises it should be more efficient and you should have less "trapped air"

meh always these "heat rises" comments.
its nonsense, heat goes where you push it, i received a temp drop when i turned my top fans as intake.

....
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post #6 of 11
Quote:
Originally Posted by Costfree View Post

I would make both top intake and have the rear as the only exhaust. As long as you have positive pressure and the airflow is from the front to back you should be good. The bottom fan is kinda useless, I added one in mine and it didn't do anything. You're probably better off adding one between the front two intakes and the GPU to bring cool air into your GPU. Just my .02 thumb.gif
Quote:
Originally Posted by justanewguy View Post

meh always these "heat rises" comments.
its nonsense, heat goes where you push it, i received a temp drop when i turned my top fans as intake.
....

Both of these are absolutely correct
post #7 of 11
I'd vote for having no top fans and no back fans
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post #8 of 11
I have the same case. I am only using the front top as intake to supply fresh air to the CPU cooler. I have the rear top sealed off (if you use it for intake it will just go out the reaer exhaust and will interfere with the rear exhaust pulling air from the CPU and other components).

The rest of mine is as you have it. I experimented with a number of configurations and this positive pressure arrangement turned out to cool the best..

I have a push-pull cooler and using no fan in the back was a little bit better as the pull fan on the CPU exhausted. However it lost its advantage as soon as I put a fan screen over it to keep the dust out.
Edited by GeneO - 3/27/12 at 6:45am
post #9 of 11
Sorry to invade your thread, but I also need some advice on my case.

so a) http://imageshack.us/photo/my-images/198/78809710.png/

would be better than b) http://imageshack.us/photo/my-images/10/33583483.png/

right?
post #10 of 11
Quote:
Originally Posted by justasomeone View Post

Sorry to invade your thread, but I also need some advice on my case.
so a) http://imageshack.us/photo/my-images/198/78809710.png/
would be better than b) http://imageshack.us/photo/my-images/10/33583483.png/
right?

Based on what some people are saying, yes.

Something I had to consider with my setup was the placement of the PC. I have mine sitting under a desk - the front fans get clean cool air, but I have to have the top fan as an outtake, else it just recirculates the hot air from the back.
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