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Question about Fan setup

post #1 of 11
Thread Starter 
So I was talking with a friend of mine and was thinking, with AIO coolers, or even liquid cooling where you have a radiator mounted up top, what would happen if you switched the normal exhaust at the back of your case to an intake? I would think that it would improve temperatures, as you've got a fresh air supply coming directly to your radiator. Anyone ever tried this before or any opinions?
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post #2 of 11
Water cooling is different than air cooling with fan setups, the "rule of thumb" is different.

Air:
1) Intakes should be on the bottom, exhausts on the top
2) Basic setup is intake on front, exhaust on back
3) More advanced setup is intake on front, intake on bottom, intake on side, exhaust on top, exhaust on back.
4) If you are using a closed loop liquid CPU cooler, you want the fans below the rad, blowing air out the case through the rad.

Water:
1) Fans should be intakes, pulling fresh air through the rad into the case.
2) Case fans, not connected to rads, should follow the rules of thumb for air.
post #3 of 11
Oh, one thing to add. Buy extra fan filters (these aren't expensive) to compensate for the fact that your intakes are probably going to be different than what the case was built for and you won't already have built in filters.
post #4 of 11
Thread Starter 
Quote:
Originally Posted by zeusthunder369 View Post

Water cooling is different than air cooling with fan setups, the "rule of thumb" is different.

Air:
1) Intakes should be on the bottom, exhausts on the top
2) Basic setup is intake on front, exhaust on back
3) More advanced setup is intake on front, intake on bottom, intake on side, exhaust on top, exhaust on back.
4) If you are using a closed loop liquid CPU cooler, you want the fans below the rad, blowing air out the case through the rad.

Water:
1) Fans should be intakes, pulling fresh air through the rad into the case.
2) Case fans, not connected to rads, should follow the rules of thumb for air.

Thanks for the response. While I do know the way to set up normally, I'm just wondering if this has ever been done and what results came of it. Also, in the case of a radiator up top, you still set it as an exhaust normally.
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post #5 of 11
You could switch a closed cooler to intake for a bit better temps, but you would want to also then have your video card(s) on closed loops and doing the same thing, otherwise your video cards would try to cool themselves with hot air from the cpu.
post #6 of 11
Thread Starter 
I should probably explain my setup. I used to be an avid watercooler (built 3 revisions on my rig with heavy watercooling) but now because I move a lot I've ditched the watercooling and gone to a smaller case. Instead now I'm using a phantom 410 and an h100i here's the current cooling setup:

2 120mm cougar vortex fans up front intake
1 120mm cougar vortex on the bottom beside the psu intake
1 120mm cougar vortex exhaust at the back
H100i up top with fans (the stock sp120s it came with) exhaust

What I'm wondering is that rear exhaust, would it be better served as an intake to feed the fans/rad of the h100i?
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post #7 of 11
So I have read quite a bit on this subject and exparamented some as well.
My case is set up to intake on top, intake on the front, and exhaust out the back. What I found in my testing (at least on my rig) is that the best temps were achieved by getting the coolest air possible to the rads.

Based on that, I would think that intaking cold air right below your radiator and exhausting it out the top would yield good results. thumb.gif

Not hard to test both ways, it would be interesting to find out what your experience is.
post #8 of 11
Ok I mis-understood, I consider closed loop systems like the h110i to be air cooling and not liquid cooling (even though technically yes, they have liquid in them).
post #9 of 11
Thread Starter 
Well right now I'm waiting for an RMA for my h100i (one of the leds is no longer working is all), and some new fans, but once those come in I'll do some benchmarks and post them up here hopefully towards the end of next week.
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post #10 of 11
I havemmine setup with the EX420 on top with 6x Bgears Blasters 140mm P-P exhaust and the UT60 240 in bottom with 4x Koolance 120x25 2600rpm P-P intake, and the two front case fans are intakes.
I experimented with the rear, and I found that in my case having the rear fan as an intake works slightly better, as I then have only the top exhausting and the top rad gets cool air from the closest possible fan mount.

I would say to try it, I can't see how it would hurt.
   
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