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Rad Fan Direction Dilemma

post #1 of 5
Thread Starter 
I'm having trouble optimizing the airflow in my case. I'd like nice temps (as I have a good number of watts to cool) but I'd also like for the fans not to be spinning faster than designed, as it's loud and annoying.

Currently my fans are like so, with all the rads being exhaust and a single front intake.


The front intake gets spun over spec so it hums and is difficult to sleep around while on. As I type this, I have unplugged the front fan which cuts case noise in half (now the loudest noise is my F3 or 35X) but raises load (both GPUs and CPU folding for 8 hours) temps by about 5C.

If I were to switch the rear rad fan to become an intake and re-enable the front do you speculate that temps would improve over no intake fans and still have it as quiet as it is now due to more balanced airflow?

I'd think that the 120mm rad might warm the air enough to cause the same 5C drop since it would them have to go through another rad. Thoughts?
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Teatime
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Maxkeyboards x8 Purple Corsair AX1200i Enthoo Primo SE (Red) Logitech G502 
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Desk TiHD + DT770Pro/250 +LDMkII 
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Phenom II X4 960T Zosma @ X6 ASUS M4A88T-M Sapphire HD 6870 G.SKILL Sniper LV 1600 
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post #2 of 5
your currently working with negative pressure, I don't believe a 120 rad would warm the system a hole lot, however it may help to reduce the acoustics as your front intake wouldn't have to work as hard, positive pressure also helps to reduce dead spots in your cooling, thus I speculate your temps will most likely drop (its always easier to have excess air escape the chassis, not enough air pressure and your intake will B-line for the exhaust not covering the hole inside of the chassis)
post #3 of 5
I think you will get worse temps as the rad fan is smaller and pushes less air than the front and the air will rise to the top of the case intantly, setting the top rad fans as intake will help alot.

Hard to believe you manage to sleep with that thing folding!
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post #4 of 5
Can you get a side panel with a couple fans on it for intake. That would be the best solution imo.
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post #5 of 5
Thread Starter 
I have a very stylish tinted window right now. I'd be a bit disappointed to get rid of it.

About reversing the 120mm, there are differing views so far. ANy more care to chime in? I'd just do it and experiment, but my tools are very large and a PITA to adjust the cable management (~45 zip ties used in total).

Do you think putting a 7V adapter on my front fan would solve the noise? The other fans will cause it to spin faster but these fans at spec or lower speeds are almost dead silent. Do you think the negative pressure would cause it to make up the lost 5V in RPMs?
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Epic $620 Build
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CPUMotherboardGraphicsRAM
6700k Z170 Classified OG Titan x2 Trident V 3000 16gb 
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SM951 512 + 840Pro 256 + others Raystorm, PMP-500, EK-FCTitan x2, 10 fans of rad Win10 Pro x64  Multi ASUS PB278Q / 85Hz 
KeyboardPowerCaseMouse
Maxkeyboards x8 Purple Corsair AX1200i Enthoo Primo SE (Red) Logitech G502 
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Desk TiHD + DT770Pro/250 +LDMkII 
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Teatime
(14 items)
 
Epic $620 Build
(11 items)
 
 
CPUMotherboardGraphicsRAM
6700k Z170 Classified OG Titan x2 Trident V 3000 16gb 
Hard DriveCoolingOSMonitor
SM951 512 + 840Pro 256 + others Raystorm, PMP-500, EK-FCTitan x2, 10 fans of rad Win10 Pro x64  Multi ASUS PB278Q / 85Hz 
KeyboardPowerCaseMouse
Maxkeyboards x8 Purple Corsair AX1200i Enthoo Primo SE (Red) Logitech G502 
Mouse PadAudio
Desk TiHD + DT770Pro/250 +LDMkII 
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma @ X6 ASUS M4A88T-M Sapphire HD 6870 G.SKILL Sniper LV 1600 
Hard DriveOptical DriveCoolingOS
WD Caviar Green 1TB Some LG Thing Hyper 212+ Win 7 Pro x64 
MonitorPowerCase
Samsung 173v Antec 430D Rosewill mATX Cheapie 
  hide details  
Reply
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