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Radiator exhaust

post #1 of 8
Thread Starter 
i felt that my radiator was not getting enough air flow so i did a little experiment.

i sealed off all the holes with painters tape (easy to remove later)
and have 3 120mm fans blowing in and 2 radiator fans blowing out. so basically there are 3 120mm fans pushing air while 2 120mm pulling out.

the amount of air is pretty good. i have both the CPU and GPU in one loop so the air blowing out is still cool.

iv noticed a drop in temps on system temps. 36c on mosfet temps instead of 40c. 22c on northbridge instead of 25.

i guess there was a lot of turbulence with random fans blowing in.

just liked to share my results with you guys.

im going to try this on my next little project. with 2 120mm and one 92mm fan pushing though a 120mm on a antec H2O out. to see if theres any drop in overall temps. im assuming the load temp will be noticeable.
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post #2 of 8
Pics? I don't understand what you did.
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post #3 of 8
Thread Starter 
Quote:
Originally Posted by railfan844 View Post
Pics? I don't understand what you did.
i just aimed all fans to blow in my case. but 2 120mm on my 240mm radiator blowing out (only exhaust) im hoping the other fans will have enough pressure to blow a good amount of air though the radiator.

in a cold room 18c im idling at 34/30/32/31 4ghz.
fans running on slow though.
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post #4 of 8
That makes sense to a large degree. It's the same principal as Corsair recommending you mount the H50/60/70 with the fans blowing into your case, as you pull in fresh cool air through the radiator instead of exhausting hot air from your case. You'd probably get better temps opening up the taped vent holes and reversing your 240mm radiator's fans so they're also blowing in, so that all the heat gets blown into the case and exhausted through the PSU or other ventilation holes.

I'm fortunate that in my new HAF-X case it has enough cool intakes around it that I may be able to get away with just exhausting the heat out the top of the case. Since in the HAF-X the radiator doesn't sit against the ceiling, it sits about an inch underneath it, it probably wouldn't work very well to have it intake either, since it will likely circulate a good amount of air in that space, unless I sealed it with tape. Sorry for the derailment there, just thinking out loud.

Interesting point though that from what I've seen I think that most people watercooling will exhaust their radiators externally, and that explains peoples concern with Corsair's instructions on the H50/60/70 to vent internally. I guess when you're dumping your CPU's heat back into the case it's not as big a deal (though it generated some concern from reviewers) as dumping a CPU and SLI/CF loop back into your case.
post #5 of 8
Thread Starter 
Quote:
Originally Posted by Dr.GumbyM.D. View Post
That makes sense to a large degree. It's the same principal as Corsair recommending you mount the H50/60/70 with the fans blowing into your case, as you pull in fresh cool air through the radiator instead of exhausting hot air from your case. You'd probably get better temps opening up the taped vent holes and reversing your 240mm radiator's fans so they're also blowing in, so that all the heat gets blown into the case and exhausted through the PSU or other ventilation holes.

I'm fortunate that in my new HAF-X case it has enough cool intakes around it that I may be able to get away with just exhausting the heat out the top of the case. Since in the HAF-X the radiator doesn't sit against the ceiling, it sits about an inch underneath it, it probably wouldn't work very well to have it intake either, since it will likely circulate a good amount of air in that space, unless I sealed it with tape. Sorry for the derailment there, just thinking out loud.

Interesting point though that from what I've seen I think that most people watercooling will exhaust their radiators externally, and that explains peoples concern with Corsair's instructions on the H50/60/70 to vent internally. I guess when you're dumping your CPU's heat back into the case it's not as big a deal (though it generated some concern from reviewers) as dumping a CPU and SLI/CF loop back into your case.
actually its the opposite of that. radiators are venting out. while all fans are blowing into the case and leaving though only the radiators.
the air on my radiator is very hot when im folding or doing stress test over time. and i dont want that air in my case.

i need a better fan controller cuz the one i have now caps out only one fan...
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post #6 of 8
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by -javier- View Post
theres more air flowing out from the radiator?

or u want cpuid kind of proof?

jk its only very noticeable during burn in. i'll do it tonight in my room to control as many variables as i can.
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post #8 of 8
I did this with my old acer case. when i told people that i sealed off a bunch of air vents everyone was like "ARE YOU NUTZ?!" but i compared the results of heat benchmarks before and after and i had a 5C-10C drop in tempurature by controling the airflow direction. the pressure worked out in my favor.

of course this wouldnt work for ALL cases, but i think that some cases have just too much free airflow where pressure that can be used is lost.
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