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[Official] Cooler Master ATCS 840 Owners Club - Page 143

post #1421 of 4402
i keep it on cause i like it, airflow is good enough anyways
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HAF 932
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post #1422 of 4402
Of course I leave it on. Truth be told, that was the reason I bought the case. I just love that solid aluminium plate.

From your question, I assume you have a cooling issue. Or are you just worried it would not be enough air?
     
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post #1423 of 4402
Im looking for a consensus on the top 230mm fans. I know a few people have messed around with them and swapped one or the other, or supplemented 120mm fans in there. Has anyone tried reversing both exhaust to intake?

Essentially I want to try and get my case to act as close to a positive pressure case as I can, or attempt to, to see the difference I can get with temps and dust accumulation.

Currently I have the 230mm intake, the optional 120mm intake for intake fans (the hard disk cage fans dont really count). I have the two 230mm at the top, the 120mm at the back and the gpu/expansion slot 120mm fan.

so just from size I have 350mm intake, and 470mm exhaust.

Another option I have been toying with is installing a 140mm fan in the 5.25 bay area, but I would be concerned with the air being prematurely exited out the top of the case.
post #1424 of 4402
Quote:
Originally Posted by Mattb2e View Post
Im looking for a consensus on the top 230mm fans. I know a few people have messed around with them and swapped one or the other, or supplemented 120mm fans in there. Has anyone tried reversing both exhaust to intake?

Essentially I want to try and get my case to act as close to a positive pressure case as I can, or attempt to, to see the difference I can get with temps and dust accumulation.

Currently I have the 230mm intake, the optional 120mm intake for intake fans (the hard disk cage fans dont really count). I have the two 230mm at the top, the 120mm at the back and the gpu/expansion slot 120mm fan.

so just from size I have 350mm intake, and 470mm exhaust.

Another option I have been toying with is installing a 140mm fan in the 5.25 bay area, but I would be concerned with the air being prematurely exited out the top of the case.
Matty -
Instead of looking at the intake vs outake equation in fan-size terms, you'd probably feel more comfortable and apt in counting in terms of CFM-in vs CFM-Out or RPM-in vs rpm-out.

Just my $0.02
Blue Lightning
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Blue Lightning
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post #1425 of 4402
Quote:
Originally Posted by maverickpk View Post
Matty -
Instead of looking at the intake vs outake equation in fan-size terms, you'd probably feel more comfortable and apt in counting in terms of CFM-in vs CFM-Out or RPM-in vs rpm-out.

Just my $0.02
I have, but I figured it would be easier to just put down fan sizes rather than CFM values. Here goes anyways

Exhaust: 476 CFM
Breakdown: 2x 200x230x30mm CM Fans 1x YL D12SH-12 UV, 1x YL D12SH-12
Intake: 238 CFM
Breakdown: 1x 200x230x30mm CM Fan, 1x YL D12SH-12UV

I didnt include the two hard disk cage fans because they essentially only pull air from the front 230mm fan.

This is all the fans running at full speed, 2200rpm for the Yate Loons, and 900rpm for the coolermasters.
Edited by Mattb2e - 4/30/10 at 8:22pm
post #1426 of 4402
Quote:
Originally Posted by Mattb2e View Post
I have, but I figured it would be easier to just put down fan sizes rather than CFM values. Here goes anyways

Exhaust: 476 CFM
Breakdown: 2x 200x230x30mm CM Fans 1x YL D12SH-12 UV, 1x YL D12SH-12
Intake: 238 CFM
Breakdown: 1x 200x230x30mm CM Fan, 1x YL D12SH-12UV

I didnt include the two hard disk cage fans because they essentially only pull air from the front 230mm fan.

This is all the fans running at full speed, 2200rpm for the Yate Loons, and 900rpm for the coolermasters.
If you ask me, I'd choose to turn the 230mm fan towards the back of the case into intake and leave the other one as exhaust. That way you have one giant fan pushing air directly into the fins of the CPU cooler. That is what I'm planning on doing this weekend. I'll do this change first and see if that lowers the temp by a degree or two, measure the temps and then proceed to redo the thermal paste application. Will then measure the temps again.

EDIT:
Well on second thought, I'd leave the rear-most fan on the top as exhaust and make the other one as intake. By doing so, you'll have air flowing into the case from the top as well as from the fans you are planning to put on the 5.25 cage. That would bring enough air into the so-called dead-zone for this case and give the push-pull fans some much needed cold air to breathe in and keep the heatsink in check. Sound like a plan?
Edited by maverickpk - 4/30/10 at 9:58pm
Blue Lightning
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Blue Lightning
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post #1427 of 4402
Quote:
Originally Posted by maverickpk View Post
If you ask me, I'd choose to turn the 230mm fan towards the back of the case into intake and leave the other one as exhaust. That way you have one giant fan pushing air directly into the fins of the CPU cooler. That is what I'm planning on doing this weekend. I'll do this change first and see if that lowers the temp by a degree or two, measure the temps and then proceed to redo the thermal paste application. Will then measure the temps again.
Im pretty sure someone has done that, just with the other fan, the one facing the front of the case. He found that the intake air that was brought in was prematurely exiting through the adjacent fan, the one in the back. I would assume that switching would achieve the same effects, but I dont know.

If you do happen to swap the fan, let me know what your results are.
post #1428 of 4402
Quote:
Originally Posted by Mattb2e View Post
Im pretty sure someone has done that, just with the other fan, the one facing the front of the case. He found that the intake air that was brought in was prematurely exiting through the adjacent fan, the one in the back. I would assume that switching would achieve the same effects, but I dont know.

If you do happen to swap the fan, let me know what your results are.
See my EDIT in the previous post.
Whoever you are saying has done that probably didnot have the fans on the 5.25 cage. If he did, those fans would have pushed air towards the CPU than being exited from the adjacent fan. In my case, since I do not have any fans on the 5.25 I'd choose to flip the rear top fan and have it blow directly into the heatsink fins.
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Blue Lightning
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post #1429 of 4402
... Just wanted to add the below:

I believe the problem with making both the top fans as intake is that there would be very less air going out causing hot air to linger around for a while before being forced out. I'm imagining a whirlpool sort of a thing right around that GPU area. Turning the top fans into intake would definitely call in for the included duct to be used as your second exhaust to improve air flow.
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Blue Lightning
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post #1430 of 4402
Quote:
Originally Posted by maverickpk View Post
... Just wanted to add the below:

I believe the problem with making both the top fans as intake is that there would be very less air going out causing hot air to linger around for a while before being forced out. I'm imagining a whirlpool sort of a thing right around that GPU area. Turning the top fans into intake would definitely call in for the included duct to be used as your second exhaust to improve air flow.
Yeah, im using the air duct currently, thats why im so high on the exhaust cfm's, im not sure about the whole vortex thing. I wish I had a way to measure case flow to see how certain things effect air flow in and out of the case.

Switching the two top exhaust fans would undoubtably make the case a positive pressure case, however as you said, there could be some lingering air. IDK, ill see how it goes tomorrow, ill run some benchmarks and see if any of the fan configurations effect temps at all.
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