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Case airflow for water cooled case...

post #1 of 6
Thread Starter 
I am scratch building my case, and all that is left is to figure out my fan placement. I am running a custom loop with the CPU and GPU under water, and the radiators are in their own chamber, so all I really have to worry about is the heat from the motherboard, VRM's and RAM. It is a horizontally mounted Gigabyte Gaming X370 K7 board with Ryzen 1700. I am wanting to minimize the number of fans because the sides are going to be glass and I want as much unobstructed visibility. Would this be adequate? The fans would be Corsair HD120's...

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post #2 of 6
I'd add a fan inside the case, blowing on the VRMs and CPU socket.




Edited by billbartuska - 4/3/17 at 8:26am
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by billbartuska View Post

I'd add a fan inside the case, blowing on the VRMs and CPU socket.




Very good suggestion, and with a wood case...really easy to add in. I also thought about adding additional fan cut outs and building glass paneled plugs for them, so I could remove the glass and pop in the fan if needed.
post #4 of 6
With fan above I/O as intake you should have enough airflow over VRM / CPU area. If the do run warm a baffle about 1" up on the fan at a slight downward angle will lower the airflow onto VRMs.

I notice 5x intake fans on radiators, but it looks like you only have 3x exhasut vents ?? Ideally we want as much exhaust vent as intake so the only restriction to airflow is the radiators .. not radiators and exhaust venting.
post #5 of 6
Thread Starter 
Quote:
Originally Posted by doyll View Post

With fan above I/O as intake you should have enough airflow over VRM / CPU area. If the do run warm a baffle about 1" up on the fan at a slight downward angle will lower the airflow onto VRMs.

I notice 5x intake fans on radiators, but it looks like you only have 3x exhasut vents ?? Ideally we want as much exhaust vent as intake so the only restriction to airflow is the radiators .. not radiators and exhaust venting.

My power supply fan is acting as an exhaust fan in that chamber, so that makes four outflow fans. The 5 radiator fans have a restricted airflow due to the radiators, while the other three fans are completely unrestricted. Based on what I have read about these fans and their airflow through radiators, vs unrestricted flow, adding in the power supply exhaust, this should be pretty close to a neutral pressure system.

I think I am going to try it without the downward facing fan over the VRM/CPU area, and see what the temps are like. As I said, since it is a wood case, adding the downward facing fan would be a snap.
post #6 of 6
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