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650D Fan Configuration

post #1 of 6
Thread Starter 
Hey guys!

I'm setting up the new 650D. I'll be using a Silver Arrow for this adventure, so that's what the 2 arrows in the middle of the case signify.

I have some experience as far as optimal airflow goes. I believe I've narrowed this down to 2 optimal scenarios. Assume that I've calculated all of the CFM to ensure (relative) equilibrium.

I'm going to have 1x 120mm in the rear, 2x 120mm in the top, 1x 200mm in the front (ew, I know. I am waiting to see if I can put 2x 120mm here instead without modding), and 2x 140mm on the SA.

Scenario 1 (see attached photo):
Rear intake with SA fans pointing inward.
Front intake.
Dual exhaust on top.

Scenario 2 (see attached photo):
Rear exhaust with SA fans pointing outward.
Top-rear exhaust, top-front intake.
Front intake.

At first, I was planning to do option #1. But the more I think about it, I believe that #2 would be slightly more effective. The top-front intake will give the SA some nice cool air for the CPU and that would create a small pocket of cool air in the bottom zone for the GPUs. What do you guys think?

Thanks as always!! <33

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post #2 of 6
Do the second one. Might try it with and with out the top exhaust, I use a top intake with the top fan spot to the left blocked of I did this so the silver arrow has constant supply of fresh cool air, and blocked off the fan spot next to it so it wouldnt exhaust warm air into the intake fans pull.

I wouldnt use the set up in the first pic unless your GPU is dumping eshaust inside the case, if your card vents outside, the warm air might come in though the rear intake vent. My 2 cents.
Edited by KhaoticKomputing - 5/2/11 at 8:15am
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post #3 of 6
Considering your CPU cooling alone, I take the Scenario 2 but with some modifications:-
a. Top rear exhaust fan not to be used. Its exhaust air might be sucked back into the case by the Top front intake fan. Red arrows A in pic.

b. Air which has just passed through the Silver Arrow should exit the case in the most direct route, ie via the case's Rear exhaust fan. This air path should not make a 90 degrees bend going upward. Red arrows B in pic. So, this justifies further the removal of the top rear exhaust fan.

c. Top front intake fan's speed needs to be carefully adjusted. If it is set too strong, it will push down the air away from the fans of the Silver Arrow. Blue arrow C in pic. I predict this fan needs to spin fairly slow.

d. Add a 120mm fan inside the 5.25'' bays as intake. It supplies fresh air in a straight line fashion to the Silver Arrow. Blue arrow D in pic.

As for the GPUs, I believe the case's front fan and a 120mm fan in the case's bottom will suffice.

Edited by windfire - 5/2/11 at 8:35am
post #4 of 6
Thread Starter 
Quote:
Originally Posted by windfire View Post
Considering your CPU cooling alone, I take the Scenario 2 but with some modifications:-
a. Top rear exhaust fan not to be used. Its exhaust air might be sucked back into the case by the Top front intake fan. Red arrows A in pic.

b. Air which has just passed through the Silver Arrow should exit the case in the most direct route, ie via the case's Rear exhaust fan. This air path should not make a 90 degrees bend going upward. Red arrows B in pic. So, this justifies further the removal of the top rear exhaust fan.

c. Top front intake fan's speed needs to be carefully adjusted. If it is set too strong, it will push down the air away from the fans of the Silver Arrow. Blue arrow C in pic. I predict this fan needs to spin fairly slow.

d. Add a 120mm fan inside the 5.25'' bays as intake. It supplies fresh air in a straight line fashion to the Silver Arrow. Blue arrow D in pic.

As for the GPUs, I believe the case's front fan and a 120mm fan in the case's bottom will suffice.
Hey thanks for all of that wind. +rep when I get back to my desktop.

I'm liking the idea of the 120mm in the drive bay. I wonder how difficult that will be to finagle. I really did not want to mod or cut anything. I'd also prefer not to ghetto-rig it.
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post #5 of 6
Quote:
Originally Posted by Plex View Post
Hey thanks for all of that wind. +rep when I get back to my desktop.

I'm liking the idea of the 120mm in the drive bay. I wonder how difficult that will be to finagle. I really did not want to mod or cut anything. I'd also prefer not to ghetto-rig it.
Two ways:-
1) Use a module like Cooler Master 4-in-3 Device module which has a 120mm fan built-in already.
Link:http://www.coolermaster.com/product.php?product_id=2542
(Lian Li and Scythe also make a similar product)

2) Use zip-ties to fix a fan onto the drive bay cage. See the 2 pics below.
Useful thread:http://www.overclock.net/air-cooling...extra-fan.html


Edited by windfire - 5/2/11 at 8:56am
post #6 of 6
Thread Starter 
Hm. That looks very interesting! Thanks again wind . +rep
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