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Determining rad and pump requirements.

post #1 of 3
Thread Starter 
I'll be building a water-cooled rig in the coming months. I want to cool just the CPU and four GPUs(7970s), and not any motherboard components. This is my first time building a custom loop so I would like to get some feedback from you guys.

Here's what I have so far.


x1 XSPC RX360 Triple 120mm


x2 XSPC RX120 120mm


x1 XSPC RayStorm High Performance Acetal Block


x1 Bitspower Water Tank Z-Multi 250 Inline Reservoir


x1 Swiftech MCP35X

Since the Lightning does not have a reference PCB I don't know if any 7970 blocks other than the one EK makes specifically for this card are compatible. I would really like to avoid the EK block, as I hate the look of the thing.

Also if there are some good looking pumps you guys would recommend I would love to hear about them. I was recommended this by a friend, but if you guys know better then don't hesitate to correct me.

Do I even need the second 120mm rad?

Thanks for your help.
Edited by Caples - 3/16/13 at 12:56pm
post #2 of 3
Skinee labs
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 3
The typical rule of thumb is 120mm of rad per block plus 120mm extra.

So in your case you would want about 5x120mm of rad.


As for finding blocks for your 7970's, EK is your best shot, you could always go Universal blocks, but I think they are a bit of a last resort. You should also ask about your card's HERE someone else might have a better solution.

The Swiftech MCP35X is a premium pump, apparently they run a bit warm, and can get noisy if not connected with PWM control. It would handle it easy. Also consider a SWIFTECH MCP655, at 24v they can give you some decent flow and pressure.

I hope this is somewhat helpful.
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