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Watercooling and airflow - Positive or negative pressure?

post #1 of 5
Thread Starter 
I'm contemplating watercooling my next build (not before 2013, so there's time ahead of me), and wonder whether you prefer to go for a postiive pressure, using some rad(s) as intake, or negative pressure, using rad(s) as exhaust? I like quiet systems, so fans would spin at 800-1000 rpm max.
post #2 of 5
Positive always. Keep the dust out of the case.I can always clean out the rads, and newer cases tend to have a dust filter of some sort anyways.
    
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CPUMotherboardGraphicsRAM
[INTEL] i7 930, 4.4ghz @ 1.27V [Asus] Rampage III Extreme [Sapphire] 2X 6950's Flashed to 6970's @950/1425 [G.SKILL] Ripjaws X Series 12GB DDR3 @ 2133 
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post #3 of 5
Quote:
Originally Posted by Hasdrubal View Post

I'm contemplating watercooling my next build (not before 2013, so there's time ahead of me), and wonder whether you prefer to go for a postiive pressure, using some rad(s) as intake, or negative pressure, using rad(s) as exhaust? I like quiet systems, so fans would spin at 800-1000 rpm max.

In my setup I get better temps with the fans intake. Not to mention the dust benefit.

Slow fans an big rads FTW. That's what I say!
post #4 of 5
I would have to agree with positive pressure. I had a negative set up before and I noticed it was accumulating a lot of hot air in a "dead space". I now have 5 fans as intake and one fan as out. I get better temps and the dust has gone down significantly.
post #5 of 5
Thread Starter 
Thanks guys! So I could get a 120.2 rad in the front and a 120.3 rad in the top, both intakes, and leave the CPU fan at the back to exhaust hot air without risking to trap hot air pockets?
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