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Help with first time water cooling build

post #1 of 5
Thread Starter 
hey all. Looking for a little guidance from the experts.

I am planning a to water cool my setup. Adding two gtx580 to my OC'ed i7 and am planning to watercool MB.

I have an 800D. Was looking for the 360 rad above and possibly a 240 in the lower where the fixed bays are. (gonna mod the case a bit, but its outlined really well on a couple different blogs/sites/etc)

I was wondering do you think I need two circuits or can I run this off of a single circuit with two radiators?

Planned equip
Black ice gt xtreme 360 and 240
mcp655 of two mcp350
EK CPU block
EK gtx580 blocks x 2
Prob xspc reservoir (unless i wanna spring for the frozen q liquid fusion that thing looks wicked)
5/8ID tubing with compression fittings

Any help, Advice, comments would be appreciated.
Home PC
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 asus rampage 4 formula SLI EVGA Titan 16 GB G.Skill 
Hard DriveOptical DriveCoolingOS
256Gb c300 x 2 HP Blu Ray Watercooled win 8 
MonitorPowerCase
30 inch HPzr30w 1200 watt Corsair AX Corsair Obsidian 800 
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Home PC
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 asus rampage 4 formula SLI EVGA Titan 16 GB G.Skill 
Hard DriveOptical DriveCoolingOS
256Gb c300 x 2 HP Blu Ray Watercooled win 8 
MonitorPowerCase
30 inch HPzr30w 1200 watt Corsair AX Corsair Obsidian 800 
  hide details  
Reply
post #2 of 5
Always, always, always use a single loop. It is one of the most common misconceptions that you will get better performance out of two loops. It's basic math:

I have a CPU that outputs some wattage X, two video cards that output some wattage Y each, and two radiators that can vent wattages V and W. My total load is X + 2Y, and my total exhaust is V + W. We obviously want V + W > X + 2Y, and it your case that would be true. But if you split it into two loops, you are limiting your cooling ability. In other words, if you aren't running your CPU at full speed, but you are running your GPU at full speed, the CPU radiator could be used for additional cooling for the GPU. But if they are in two separate loops, then you are basically wasting cooling capacity.

So, we split the loops: V with 2Y and W with X. If the GPU has full load, say V = 2Y, and the CPU doesn't (X << W), then we could be using the W-X capacity for the GPU, but since they are in separate loops we can't.

Now, it is always true that two loops will, at best, cool exactly as well as one loop with exactly the same components, but at worst, the performance could be half of the single loop. If you have two pumps for your two loops, and then use only one pump for your one loop, then no, you won't get the same performance.
post #3 of 5
Thread Starter 
That's really helpful and makes a lot of sense when you put it that way. Appreciate the insight
Home PC
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 asus rampage 4 formula SLI EVGA Titan 16 GB G.Skill 
Hard DriveOptical DriveCoolingOS
256Gb c300 x 2 HP Blu Ray Watercooled win 8 
MonitorPowerCase
30 inch HPzr30w 1200 watt Corsair AX Corsair Obsidian 800 
  hide details  
Reply
Home PC
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 asus rampage 4 formula SLI EVGA Titan 16 GB G.Skill 
Hard DriveOptical DriveCoolingOS
256Gb c300 x 2 HP Blu Ray Watercooled win 8 
MonitorPowerCase
30 inch HPzr30w 1200 watt Corsair AX Corsair Obsidian 800 
  hide details  
Reply
post #4 of 5
Happy to help. If you need anything else, just ask.
post #5 of 5
Just to add my two cents, I cool CPU, 2x GPU Full Block, Mobo full block, one RX480 and an RX240 on a single mcp655 and my flow is great, temps are awesome. The mcp655 is an absolute beast and as long as the blocks aren't too restrictive it'll power through a lot of components no problem.

EDIT: By the way, 5/8"ID tubing? Do you mean 1/2"ID 5/8"OD? I've never seen 5/8"ID before...
Edited by Nicktlloyd - 11/8/11 at 11:47am
    
CPUMotherboardGraphicsRAM
Phenom II X6 1100T ASUS Crosshair IV Formula 2x ASUS EAH6970 Team Xtreem LV Series 8GB @ 2000MHz 
Hard DriveOSMonitorKeyboard
Intel 510 Series 120GB SATA SSD Windows 7 2x Samsung SyncMaster Microsoft Sidewinder X4 
PowerCaseMouse
ENERMAX REVOLUTION85+ ERV1020EWT 1020W NZXT Tempest Logitech G500 
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CPUMotherboardGraphicsRAM
Phenom II X6 1100T ASUS Crosshair IV Formula 2x ASUS EAH6970 Team Xtreem LV Series 8GB @ 2000MHz 
Hard DriveOSMonitorKeyboard
Intel 510 Series 120GB SATA SSD Windows 7 2x Samsung SyncMaster Microsoft Sidewinder X4 
PowerCaseMouse
ENERMAX REVOLUTION85+ ERV1020EWT 1020W NZXT Tempest Logitech G500 
  hide details  
Reply
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