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Questions about fan placement during my first build

post #1 of 9
Thread Starter 
Hi.

I'm about 2/3 through my first build when I encountered a little problem. Should My fan be intake or exaust?


This fan here:




Sorry for the crappy photo



btw,

Any tips on cable management?

And what are some good temps for a 3820? Any advice on overclocking?. I know it's not a "K" Processor, but I read that its partially unlocked up to 44 so I can still overclock it to like 4.5 GHz or something.

also, I didn't buy a dvd drive but I have a usb one laying around. can I install windows with that, or will I have to use an actual 5.25 drive?


Thanks.
Edited by Jcoast - 12/7/12 at 5:11pm
post #2 of 9
exhaust..you want the h100 to be exhause also..and the others being intake..i have the same case and same setup.and yes i install windows from usb all the time
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snitchkilla
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post #3 of 9
Quote:
Originally Posted by snitchkilla11 View Post

exhaust..you want the h100 to be exhause also..and the others being intake..i have the same case and same setup.and yes i install windows from usb all the time

I disagree completely. You want the H100 to pull cool fresh air from the outside the case, through the radiator, and then into the case; then have the rear fan exhaust it outside of the case. You do not want to pull warm air from inside the case, through the radiator then outside the case.

This is why I sit in the mid to high 50's during load in Prime @ 1.45v
Edited by BiG StroOnZ - 12/8/12 at 10:33pm
post #4 of 9
well, the way i see it, you'll need the flow of air going one way or the other.

if you have no other case fans i would definitely use it as an intake fan.
if you have 1 intake fan in the front, you will want to consider changing that to exhaust and using this one as intake, if not then just use it as an exhaust fan.
if you have 2 intake fans already, then definitely use it as an exhaust fan.

the whole point is to keep the air pressure inside the case neutral to positive. you want a little air pressure inside the case to increase the amount of heat the air can hold. directing the airflow over a radiator or heatsink will just increase the movement of air over it, slightly increasing performance.
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Heisenberg
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post #5 of 9
I have on intake fan in the front, a side fan intake, the H100 also pulling air into the case, and simply the rear fan exhausting air out of the case.

Seems pretty logical to me. Changing that format really doesn't make sense. My motherboard sits at 27 degrees, my video card sits at 35 degrees, and my CPU idles at 30. Only thing is, I have an aftermarket fan with higher CFM (133) exhausting out the rear. If you are having that much intake, you need to be able to exhaust the air just as fast. If you don't, then yeah that setup may not make that much sense and will cause problems.


Edited by BiG StroOnZ - 12/8/12 at 11:52pm
post #6 of 9
Thread Starter 
I have 3 Intake fans in the bottom right of my case and two case fans on the side of mt hard drive bays right next to my graphics card. (NZXT Switch 810)

post #7 of 9
Quote:
Originally Posted by BiG StroOnZ View Post

I have on intake fan in the front, a side fan intake, the H100 also pulling air into the case, and simply the rear fan exhausting air out of the case.
Seems pretty logical to me. Changing that format really doesn't make sense. My motherboard sits at 27 degrees, my video card sits at 35 degrees, and my CPU idles at 30. Only thing is, I have an aftermarket fan with higher CFM (133) exhausting out the rear. If you are having that much intake, you need to be able to exhaust the air just as fast. If you don't, then yeah that setup may not make that much sense and will cause problems.

I have the exact fan set up. When I changed my top rad fans from exhaust to intake, it lowered by idle and load temps by 8-10 degrees. I have an Excalibur cranked up in the back as the sole exhaust (no counting gpu and psu. Every situation is different but this set up worked best for my set up.
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post #8 of 9
Thread Starter 
I'll try both and see which has lower temps.
post #9 of 9
It ultimately depends on the power of your fans. The problem is that gravity makes the particles of air tend to fall, however the hotter particles tend to rise. So, in effect it depends on the airflow of the fans and the total amount of heat output of the computer. If there is a lot of heat being ouput, then an upward flow would be better. If it runs semi-cool then it would give you more total airflow to point the fans toward the bottom of the case. Also keep in mind you will want ample room underneath the case to help dissipate the air below the case.

All in-all, after everything is said and done, slightly positive air pressure is beneficial in both cases.
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