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Is this fan configuration any good?

post #1 of 8
Thread Starter 
The case is a CM 690 II Adv. Is this configuration good for best possibel airflow? Note, this is how it is right now in my system.

Green represents airflow.

unledtbd.png
post #2 of 8
Turn off the rear top fan. Rmove it and cover the position. You've got the start of a wind tunnel there, which is a good thing.
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alpha updated
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by ehume;13581617 
Turn off the rear top fan. Rmove it and cover the position. You've got the start of a wind tunnel there, which is a good thing.

I'm confused... Why remove it if it is a good thing? And "cover" the position? What does that mean?

Also, I have a small 80mm fan on the left side intaking air onto the back of teh MB, where the CPU is.
post #4 of 8
I like to keep a equal or negative pressure. so mine looks like this.
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by ClickJacker;13581697 
I like to keep a equal or negative pressure. so mine looks like this.

Can you install a bottom fan on 690 II Adv? If so, do I need to remove the hard drive compartment? (the 4 door one)
post #6 of 8
Quote:
Originally Posted by ComradeNF;13581457 
The case is a CM 690 II Adv. Is this configuration good for best possibel airflow? Note, this is how it is right now in my system.

Green represents airflow.

99024988.jpg
and if you have that option will be much cooler

both fan on top of the case must blow out , if you force one fan IN and another OUT you will have warm air all around of cpu and gpu, because hot air always stays on top cold air stays in bottom.
Edited by skyn3t - 5/20/11 at 10:54pm
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post #7 of 8
Set it up however you want, following a couple principles:

-You want approximately equal CFM in and CFM out, with a little bias towards CFM in to maintain positive pressure and keep your case from sucking in dust through all the cracks.
-Try to keep fans that are close together pointing in the same direction
-Have a picture of how you want air to flow in your case
-Realize that hot air does tend to collect at the top of your case, but the effect isn't so significant as to dictate your entire fan configuration.

I've got my top and front fans as intakes, and side and back as exhausts.
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post #8 of 8
Quote:
Originally Posted by ComradeNF;13581661 
I'm confused... Why remove it if it is a good thing? And "cover" the position? What does that mean?

Also, I have a small 80mm fan on the left side intaking air onto the back of teh MB, where the CPU is.

A wind tunnel is good. You have a start at one, but only a start. The rear top fan will pull air away from your flow. Remove that fan. Buy a sheet of plastic at a hobby store and cover/block/repair/obliterate/seal off that space.

Also remove your rear fan and grill. You don't need them and you only add noise. With an open space you have no need to balance your intake and extraction: the air finds its own way out, and quietly.
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alpha updated
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secundus
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