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Setting up the corsair 900D with h100i

post #1 of 6
Thread Starter 
Hey.
i just received today my 900D after a long time finally!can someone recommend me please what is the best way to set up the AF-140/120 fans to get the best airflow in case?
option 1:

option 2

which option do you think will have the best airflow?
thanks
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post #2 of 6
Not option 2. You do not want case air going through your radiator. You want fresh external air.
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post #3 of 6
Option 2, but instead having the back as exhaust.
post #4 of 6
Quote:
Originally Posted by yanks8981 View Post

Option 2, but instead having the back as exhaust.

You never use warm air for cooling a radiator.

You have to throw out all notions of proper case flow when you are water cooling.

If you had a radiator in the bottom, the top, and a 120 in the rear you would have every single one of those fans as intake fans.
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post #5 of 6
tbh I've never had an issue using my rad as an exhaust..
post #6 of 6
Quote:
Originally Posted by Eagle1337 View Post

tbh I've never had an issue using my rad as an exhaust..

You wont have an issue... just higher temps. For every degree the air inside your case is the water will be that much warmer and then the CPU will be that much warmer. On a 900D might only be 2C on a smaller case with less fans it will be more and quite possibly much much much more. But on the 900D what in that case would benefit 2C by the tiny amount of air that will be exhausted through that radiator?

The thing you should keep in mind though is that fans don't flow a lot of air through a radiator because of the restriction... just put your hand above the radiator and feel how much air is coming out. So now not only are you pushing warm air into the radiator but you are not really exhausting a lot of air in the first place.

It really isn't a questionable thing if you think deeply about it. You want the air that goes into the radiator to be as cool as possible... that is not what you are getting from the case.


The issue with comprehending this is that you have been fed a specific idea of proper airflow in a computer case: the back and top should be exhuast, the bottom should be intake, hot air rises, there should be as many in as out.

Throw all of that out of the window as soon as you stop using a CPU heatsink and start using a radiator. The location of the radiator is just that it is a location and it no longer operates as a proper intake or exhaust unless you are using server grade fans. It is simply a place to locate your radiator and you should be doing everything it takes to optimize the performance of that radiator.

If you bought that case I am guessing you are eventually going to graduate to a real loop and at that time this concept will be even more important to the performance of your water loop.
Edited by givmedew - 9/12/13 at 12:01pm
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