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New Build w/ Water Cooling Advice

post #1 of 4
Thread Starter 
Hi, I'm starting planning on a new serious performance build. I've watercooled before, but it was only a cpu and dual gpu cooling. This time around I want to add a mobo block to the system.
Specs:
Asus Rampage IV Extreme
i7 3930k
2x GTX 670's

There will be a total of 5 blocks, the CPU block, the 2 GPU blocks, them 2 separate blocks for the motherboard. My question concerns the radiator size and the need for pump performance (especially if dual pumps are needed). So far I've got all the 1/2 inch tubing route planned out. My case supports a triples 120mm rad at the top, and has an extra spot on the bottom side for a single 120mm rad.

My route plan is starts out at the dual bay reservoir with attached XSPC D5 vario 300gph pump to the triple rad ===> chipset block ===> CPU ===> vreg block ===> GPU 1 bridged to GPU 2 ===> single rad ===> reservoir/pump.

Does this setup seem to allow for the standard 10 degree C difference between coolant and air temp? Is it necessary to have an extra pump since the d5 vario is such a high performance pump?

Thanks for all the help and tips smile.gif
post #2 of 4
Liquid cooling is one of the most controversial subject in computers today. You have to consider the following...

As long as the pump is fed DIRECTLY by the reservoir to alleviate wear from bubbles, ORDER DOESN'T MATTER. The difference in the coolest part of a loop and the hottest part of a loop is plus or minus 3 degrees. It is all a cycle so if you think about a cycle, It has to pass through everything before coming back to that same starting place.

You only need one pump... the only time I would recommend two serial pumps is when you have 4 GPUs, 2 CPUs, a quad radiator, and 2 triple radiators. smile.gif

Triple Rad + Single Rad is plenty!
Edited by ryan9298b2 - 10/31/12 at 1:12am
    
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CPUMotherboardGraphicsGraphics
Core-i7 990x Extreme Edition ASUS ROG Rampage III Extreme EVGA GTX 560Ti (SLI) EVGA GTX 560Ti (SLI) 
RAMHard DriveHard DriveHard Drive
Corsair Dominator (6x4GB) DDR3 Intel 520 Series SSD Seagate Barracuda 7200.12 Corsair Force GT 
Optical DriveOptical DriveCoolingCooling
Sony Optiarc DVD ROM Sony Optiarc Blu-Ray Burner Corsair H100 SilverStone Air Penetrator 120mm Fans  
CoolingCoolingOSMonitor
SilverStone Air Penetrator 140mm Fans  Corsair 120mm Fan Windows 7 Ultimate x64 Dell 2209WAf 1680x1050 IPS  
KeyboardPowerCaseMouse
Dell QuietKey SK-8000 Corsair Pro Series Gold AX1200 Corsair Obsidian 800D Full Tower Logitech Performance MX Wireless 
AudioAudioAudioAudio
Creative Sound Blaster X-Fi Titanium Fatal1ty C... Logitech X-530 5.1 Surround  ASUS ROG Vulcan ANC Blue Snowball Brushed Aluminum Microphone 
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post #3 of 4
Quote:
Originally Posted by ryan9298b2 View Post

As long as the pump is fed DIRECTLY by the radiator to alleviate wear from bubbles, ORDER DOESN'T MATTER. The difference in the coolest part of a loop and the hottest part of a loop is plus or minus 3 degrees. It is all a cycle so if you think about a cycle, It has to pass through everything before coming back to that same starting place.
You only need one pump... the only time I would recommend two serial pumps is when you have 4 GPUs, 2 CPUs, a quad radiator, and 2 triple radiators. smile.gif
Triple Rad + Single Rad is plenty!

Perhaps the poster above meant to say as long as the pump is fed by the res? That seems to be the popular logic of the day. Although I have seen some brave souls try to replicate a closed loop without a res.

Personally, I have 2 pumps in my system. I use 2 MCP35X pumps because I can run them PWM and control the flow in my system as well as the noise from the pumps. My system sits on my desk and I like it quiet. smile.gif

The rad setup you are suggesting is similar to what I ran in my first build for a single 3770 CPU and 7970 GPU. I was able to get fair overclocks and retain the 10 deg C deltas without running the fans or pumps at 100%. You might run into issues if you are looking for stellar overclocks and need to add fans/rads to compensate.

Also keep in mind that mobo blocks by all reports are fairly restrictive.

This is by no means exact science, but I used this for my last 2 builds and it seems to help me with the calculations.
http://martinsliquidlab.org/pump-and-radiator-optimizer-spreadsheet/
Other than the spreadsheet there is a weath of test data on rads/pumps/fans etc...

Good luck, let us know how it goes. smile.gif
post #4 of 4
Thread Starter 
Thanks for the advice! I wasn't worried per say of the flow order and temperature of the coolant, than the restrictiveness of the blocks themselves.
And thankyou for that link, its super helpful! smile.gif
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