Rear fan direction with water cooling?

dogin · #1 01-07-2008, 16:16

Just trying to find the best cooling set-up and looking at the air flow on my Coolermaster Stacker. Have a Thermochill 120.3 mounted in the top pulling air out of case (do not like the idea of the other direction forcing more hot air in case). The CPU, NB and vid card are water cooled. A 120mm intake fan is on front bottom on the hard drive cage. I am wondering if I reverse the rear case fan to blow cool air in (instead of out), if that would improve overall cooling since have the three rad fans pulling air out of case??? Right now my room ambient is 23.1C, My CPU E6850 cores idle at 35C, NB 33C and GPU 34C/mem33C. Any thoughts would be appreciated.

supershanks · #2 01-07-2008, 16:38

Hi dogin,
Welcome to the forum sounds a nice build m8.

Yes I'd try with it as an intake.
I'm on water & all my fans, including rad are intake, but my case has a lot of air holes around the back & front Lian-Li V2000B+ The idea is there is positive air pressure into case, which then vents out.

I was like yourself in my thinking,

Quote:

pulling air out of case (do not like the idea of the other direction forcing more hot air in case)

when I first moved to water, but the exhausted air from the radiator is still prety cool, unlike the exhaust side of an air cooler.

Clunk · #3 01-07-2008, 17:27

Quote:

Originally Posted by supershanks

Hi dogin,
Welcome to the forum sounds a nice build m8.

He's been here since December

godsdog · #4 01-07-2008, 17:30

Clunk · #5 01-07-2008, 17:30

I had the 120.3 fans blowing downwards on my G70 and that worked best for that setup, but you do end up with a lot of dust.

Having the rear case fan blowing inwards can be a good idea, especially if your case has a lot of air holes for any hot air to escape.

You can also make a small ducting so that the rear fan blows directly on the PWM area

supershanks · #6 01-07-2008, 17:33

went crossed Eyed & saw the thanks = 1

Anyways yer always welcome

dogin · #7 01-07-2008, 18:01

Going to give it a shot then. Like the idea about the PWM area. Thanks again everyone!

dogin · #8 11-07-2008, 16:42

Dropped all temps 1C including vid card temps. Thought the heat off PWM area would possibly nuetralize the added cool air coming into the case, but guess it works better than I thought?

supershanks · #9 11-07-2008, 16:47

Ah well that sounds like a good move then