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Intake or outtake for top radiator

post #1 of 15
Thread Starter 
Hi OCN.

Quick question: This is my current setup for my radiator.

I have one exhaust coming out the back of my computer.

Would this be a better choice?

Would this lower my ambient temps?

Thanks for looking.
post #2 of 15
The top and rear are almost always exhaust, front and bottom are intake.
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post #3 of 15
Thread Starter 
Quote:
Originally Posted by AnAngryKoala View Post

The top and rear are almost always exhaust, front and bottom are intake.

Thank you sir. Unfortunately this will require me to sell my RX360 for an EX360 as the RX is way too thick for me to mount the fans :|

Also, I heard that mounting a radiator as exhaust will up the cpu temps. Is this true?
post #4 of 15
Quote:
Originally Posted by AnAngryKoala View Post

The top and rear are almost always exhaust, front and bottom are intake.

Disagree. First of all, what data do you have to make a statement like this? I will agree that this is the case, probably, if there is no rad in the top. If there is a rad, I am not ready to support this statement at all. Again, this is a statement with no supporting evidence presented. In fact, from my own reading and research, most people favor having the rad as an intake, including me.
Quote:
Originally Posted by kevosuki View Post

Thank you sir. Unfortunately this will require me to sell my RX360 for an EX360 as the RX is way too thick for me to mount the fans :|

Please clarify. Does this mean you do not have fans mounted to your rad right now? If so, your loop is not performing anywhere near what it is capable of. The rear fan will not really pull that much air through the rad for you. If you do have fans attached, simply turn them over and leave them mounted where they are. In other words, if they are set in push, then convert them to pull, if you need to change your air flow pattern.
Quote:
Originally Posted by kevosuki View Post

Also, I heard that mounting a radiator as exhaust will up the cpu temps. Is this true?

Temp may go up a bit as the air entering the rad will be, usually, warmer than the room air, so it will not be as efficient. The rate at which cooling occurs is related to the difference (delta) in the two temps, air and water. The bigger the delta, the better the heat exchange.
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post #5 of 15
Quote:
Originally Posted by AnAngryKoala View Post

The top and rear are almost always exhaust, front and bottom are intake.

"almost always"... more like "it depends on how youre set up"

i have two 120mm radiators blowing down on the bottom of my case, my two top fans as intake, and rear fans as exhaust. I have found this to be the best/most efficient way to moving heat out of my case and keeping good temps.

"it really depends"
post #6 of 15
Quote:
Originally Posted by Aesthethc View Post

"almost always"... more like "it depends on how youre set up"

i have two 120mm radiators blowing down on the bottom of my case, my two top fans as intake, and rear fans as exhaust. I have found this to be the best/most efficient way to moving heat out of my case and keeping good temps.

"it really depends"

Thank you for supporting my position. thumb.gif
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post #7 of 15
Quote:
Originally Posted by Capt Proton View Post

Please clarify. Does this mean you do not have fans mounted to your rad right now? If so, your loop is not performing anywhere near what it is capable of. The rear fan will not really pull that much air through the rad for you. If you do have fans attached, simply turn them over and leave them mounted where they are. In other words, if they are set in push, then convert them to pull, if you need to change your air flow pattern.

This is key.

Running rads passively (no fans) really puts your cooling potential at almost nil. Even 1 single fan on a triple rad would do a lot better, though I would recommend having at least 1 per 120mm of rad space.

My own personal setup is similar to the first picture, my EX240 on top and EX120 on front are both push/pull intake while my rear fan is exhaust. Push/pull isn't necessary though, but it's great for running lower RPMs on thinner rads to get better static pressure than just push or pull.
    
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post #8 of 15
Thread Starter 
I have 3x120mm 1650 rpm fans mounted currently as intake.

Thanks for everyone's insight!
Edited by kevosuki - 3/25/13 at 7:38am
post #9 of 15
Honestly the difference is so slight I would not worry about it. Just set it up which ever way works best for you. True, air coming in from outside the case will be slightly cooler than the air inside the case but this slight temperature difference will have very little, if any effect on the loop equilibrium. Most cases have lots of vents besides the fan mounting areas, due to this I have all my fans set as intakes and thus the air is just passively exhausted out of the case due to positive pressure. I have switched from intake to exhaust and it made no difference.
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post #10 of 15
I'm always a fan of top being intake. It is always a good idea to have positive air pressure in a case.
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