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Redesigning/reorganizing my loops... Thoughts/Ideas?

post #1 of 3
Thread Starter 
So Im reorganizing my watercooling loop and setup and am looking for some feedback from the community.

This is a picture of my current setup (second gtx680 + block is on the way):
700

Topic 1
Right now I have two separate loops; one for the GPU's and one for the CPU. However, I am thinking I'd like to make one loop with my two MCP35x pumps in series. It seems logical to run the loop CPU Block --> radiator #1 --> GPU Blocks --> radiator #2. What would happen if I ran it like CPU Block --> radiator #1 --> radiator #2 --> GPU Blocks ?
The rads are 3x140mm in the top and 2x120 in the bottom. Ideas?

Topic 2
Now on to the next topic. I currently have air being pulled from outside of the case through the top radiator, the bottom radiator and through the two 140mm fans in the front of the case. That means my only exhaust is the single 140mm fan in the rear of the case (which can be seen in the photo).

While there is nothing "wrong" with this, sometimes I wonder if having soooo much intake and very little exhaust is a bad thing. Thing is, the dual 140s in the front are pretty much set to be intake and the solo 140 in the rear is set for exhaust. I suppose I could keep the bottom as intake and use the top as exhaust, but there's something about blowing warmer "case air" through my triple 140 rad instead of using it as intake and pushing cool ambient air through it. Thoughts?
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post #2 of 3
Topic 1: I'd recommend a single loop, you get better cooling at partial-load situations (gaming for example), like most of us use our computers for. You can route it whatever way is the cleanest tubing, the temperature difference is insignificant. It takes ~260w of heat to raise water moving 1GPM by 1C, with a pair of 35X pumps you'll be moving even faster than that, so even if you went GPU > GPU > CPU > Rad > Rad, the CPU would be seeing less than a 2C higher temperature, which isn't enough to affect anything. With your higher flow rates, I'd expect to see the increase within the margin of error.

Topic 2: I prefer to have more intake, as it creates a positive pressure system and makes dust predictable (and preventable with intake filters). You are slightly shorter on exhaust than I'd normally want, though. Have you considered turning the front intake fans to exhaust instead? I know this is counter to traditional airflow, but the with the large amount of intake it's easy to force air around.
Primary System
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte P55A-UD4P 2x EVGA GTX460 2x 4gb Corsair Vengeance 
Hard DriveCoolingCoolingCooling
Samsung F4 XSPC Rasa cpu block 2x XSPC Razor 460 Black Ice GTX 360 
CoolingOSMonitorKeyboard
MCP-350 Windows 7 64bit Samsung SyncMaster SA300 23" Filco Majestouch "Otaku" Tenkeyless 
PowerCaseMouseAudio
Corsair TX850W v1 NZXT Whisper Logitech Performance MX Altec Lansing ATP3 
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Primary System
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte P55A-UD4P 2x EVGA GTX460 2x 4gb Corsair Vengeance 
Hard DriveCoolingCoolingCooling
Samsung F4 XSPC Rasa cpu block 2x XSPC Razor 460 Black Ice GTX 360 
CoolingOSMonitorKeyboard
MCP-350 Windows 7 64bit Samsung SyncMaster SA300 23" Filco Majestouch "Otaku" Tenkeyless 
PowerCaseMouseAudio
Corsair TX850W v1 NZXT Whisper Logitech Performance MX Altec Lansing ATP3 
  hide details  
Reply
post #3 of 3
Thread Starter 
Quote:
Originally Posted by bakageta View Post

Topic 1: I'd recommend a single loop, you get better cooling at partial-load situations (gaming for example), like most of us use our computers for. You can route it whatever way is the cleanest tubing, the temperature difference is insignificant. It takes ~260w of heat to raise water moving 1GPM by 1C, with a pair of 35X pumps you'll be moving even faster than that, so even if you went GPU > GPU > CPU > Rad > Rad, the CPU would be seeing less than a 2C higher temperature, which isn't enough to affect anything. With your higher flow rates, I'd expect to see the increase within the margin of error.
Topic 2: I prefer to have more intake, as it creates a positive pressure system and makes dust predictable (and preventable with intake filters). You are slightly shorter on exhaust than I'd normally want, though. Have you considered turning the front intake fans to exhaust instead? I know this is counter to traditional airflow, but the with the large amount of intake it's easy to force air around.

Glad to get some support for the single loop and to hear about the insignificance of the order.

Yeah I could turn the fron fans into exhaust, shouldnt be a problem. you agree though that i shouldnt use the top for exhaust, right?
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