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Intake radiator on the top rear. Could I?

post #1 of 4
Thread Starter 
What's up peeps.

I'm facing a cooling paradox here and I'm hoping someone could shed some light.

I have a Corsair 300R with a H80i cooling my I5 4690K and one air-cooled GTX 970 G1.

I've recently moved my H80i to the mid front, because intaking cool air works the best for watercooling. But since I've done that I noticed some increase in temps on my GTX970. Mainly because all the hot air from the radiator is going directly onto the card.

My question is: could I setup the radiator on the top rear of the case, but as intake? I know all about the "airflow rules", intake front-bottom, exhaust top-rear... I thought of that because un the back, the hot air from my radiator would be exhausted directly beyond the two 140mm top fans. In my mind, as hot air tends to go up and not down, the hot air would enter the case but it would get directly sucked out by the two top fans. Also, the two front intakes would be free to send cool air direct to my vga helping it remain cool.

My case setup:

Right Now > Intake: 2x140m side, 1x140mm fron, H80i front / Exhaust: 2x140mm top, 1x 120mm back
Plan 1 > Intake: 2x140mm side, 2x140mm front, H80i top-rear / Exhaust: 1x140mm top, 1x120mm top (this would keep H80i intaking cold air)
Plan 2 > Intake: 2x140mm side, 2x140mm front / Exhaust: 1x140mm top, 1x120mm top, H80i top-rear (this would sacrifice some of the cooling capabilities of the H80i in exchange for lower temps on the graphics card.)

What would be best to keep my cards cool? Also I plan to go 2way SLi soon, so the scenario will only get worst.

Pic of my case as it is now (It has 2 more 140mm fan on the side window):
Warning: Spoiler! (Click to show)

Edited by juniordnz - 1/13/15 at 8:12pm
post #2 of 4
yes. Intake front keeps your papers from blowing around on your desk (because back in the day thats where your machine was because cables were short) and if you've got an air filter it will be there. If you don't have an air filter, or have one for the top, and don't mind air exhausting out the front it eill be fine.
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CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
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Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
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New gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
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post #3 of 4
Thread Starter 
I dont think you got my idea. I'm currently using it as intake on the front and that's what making my VGA hot.

The plans are to move it to the rear-top and use it either as an intake or exhaust.

Intake would disturb the case airflow and Exhaust would use hot air from the inside which is not optimal. I'm trying to choose which is the lesser compromise.
post #4 of 4
I think i got it right. perhaps i expressed myself poorly. As I understand it what you want to do is reverse your case airflow. have it draw from the top and exhaust from the bottom front. This is totally doable, as the old "in from the front" stuff is just a holdover from an earlier age.

You have the choice of moving your cpu cooler to the top to get it farther from your gpu, or leaving it where it is and simply turn your fans back to font. I'm not sure how much good the first will do, as if it is the only air inlet the heat the air will remain hot, but if you switch your gpu to exhaust in the front, will more or less solve your problem. Not all of the incoming air will pass throught the gpu, so your cpu won't heat up as much as your gpu did, and likely produces less heat to begin with. If your GPU is a reference blower style you will be doubly blessed because it is it's own exhaust.

only downside is you will be working your top fan pretty hard. One option if (and only if) your have a blower style gpu. is to omit the top fan, and run a negative pressure case. you will want one of those magnetic stick on dust filters, as the downside of negative pressure is dust, and you will want to keep it clean, as if it clogs up your machine will heat up quickly.
New gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
  hide details  
Reply
New gaming rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
4770k some mid range asrock. extreme 4 maybe? 2x gigabyte windforce 7950 2 x 8 corsair balistix sport 
Hard DriveOptical DriveCoolingOS
crucial ct960 LG blu-ray used venamous x win 8.1 pro 
MonitorKeyboardPowerCase
Crossover 30Q5 PRO 30" 2560X1600  cheapest piece of crud I could find antec HCG 750 some thermaltake microcenter blue-light-special... 
MouseMouse PadAudio
came with the cheapass keyboard who cares? some $30 no name 2+sub speakers I bought at mic... 
  hide details  
Reply
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