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Question on airflow for video cards that dump air into the case

post #1 of 10
Thread Starter 
So my video card is the MSI Twin Frozr III which dumps half the air into the case and the other half outside the case (like a regular video card). And I'm wondering how to deal with the air that was dumped in the case.

Current setup:


I realize the obvious solution is to switch my H100 as an exhaust, but I rather keep it as intake .

Would adding a fan in the 5.25 drive bay as an exhaust to suck the video card air out work or would it cause a dead zone or something?
post #2 of 10
Maybe switch the front 200mm fan around as an exhaust? So you have the side 200mm intaking air for your graphics card and the air can exhaust out the rear and the front. Since you have the H100 as intake the intake/exhaust should still be relatively well balanced.
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post #3 of 10
I propose the setup as shown in the pic below.

Basically, you put the H100 rad into the case's 5.25'' bays. Front fresh air will pass through the rad. The warmed air will then be extracted immediately out of the case by the case's top exhaust fans. Internally dumped hot air from graphics cards will also be pulled upward and extracted out of the case by the top exhaust fans as well.
post #4 of 10
Thread Starter 
Thank you both for the ideas, I'll try both of them out tomorrow. Though I have a funny feeling the H100 won't fit in the 5.25 drive bays , but we'll see.

The front fan idea is pretty interesting as well. If I made it an exhaust and added a fan in the 5.25 as exhaust, I could just flip the back fan to an intake.
Edited by Blizzfury - 8/9/11 at 9:35pm
post #5 of 10
Only issue I can think of turning the rear fan to intake is that it's not really going to contribute to cooling much, since the air will most likely get caught in the current of the h100 and/or get exhausted by the 5.25 bay exhaust. Although it may help to cool the VRM/north bridge?
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post #6 of 10
I'd try adding an intake in the 5.25 bay and see how temps are affected. Switching rear exhaust to intake is going to recirculate hot air inside the case. You can greatly increase your exhaust airflow by cutting out back fan grill. Check out this thread.
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post #7 of 10
I'm running 2 580s, one is a Twin Forzr III and the other a Twin Frozr II. I have this fan as a side intake and I have this, this, and this fan as a front intake. The 135mm fan is directly in front of the video cards (attached to the hard drive cage) and the 120mm fan is at the very top front where the top two 5,25" bays are. The 200mm fans are in the spots where the stock 200mm fans were in the side panel and in the bottom front. I'm using the stock 200mm top exhaust fan still and I removed the rear exhaust fan to provide an obstruction free path for my cpu cooler to exhaust air. My gpu temps do not exceed 62C under load with clocks of 850 on the core and 2125 on the memory. I know my set up is a little different from yours due to you having an H100, but I figure the info may be useful since we have the same case.
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post #8 of 10
Keep in mind that most of the air those coolers dump back into the case is out of the sides, not the back. A side exhaust or side intake with good front to back airflow should work fine. Measure temps and let us know regardless.
    
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post #9 of 10
you'll see an increase in cpu temps with that as a "side effect"
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post #10 of 10
Quote:
Originally Posted by SirWaWa View Post
you'll see an increase in cpu temps with that as a "side effect"
Really depends on the airflow of your case imo. My cpu load temp in Prime95 is 62C @ 4.5ghz and 1.32vcore.
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