Water Cooling Flow requirements and order

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Unboundstorm

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Dec 28, 2013
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I'm going to be building a new PC soon and have never done watercooling but want to try it out. I plan on watercooling the CPU and both GPU's in the build. There's gonna be pretty heavy heat load on it (2 1080's and an i7 6850k).

I currently plan on using this pump and this radiator. I plan on running the tubing so that all the components are in parallel instead of series.

So here's my questions:
-Pros/Cons of using 3/8" tubing or 1/2" tubing
-Since the GPU's will clearly be producing a higher amount of heat, should I consider throttling flow to the CPU to direct more cooling to the GPU's?
-Will the pump I have chosen be able to cause enough flow to adequately cool everything?
 
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fry178
because you will end up with about the same cost (maybe less), but less problems,
as one component failing will not take down the whole rig.


a good cpu-AIO (non EK) not based on asetek design, will go for around 90$
https://smile.amazon.com/dp/B013WAY9UQ/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2DSDNRT3KLLAR&coliid=I14FVYKXIWB32N&psc=1


gpu cooler with a 120 rad, about 95$ each

https://smile.amazon.com/ARCTIC-Accelero-Hybrid-Generic-120/dp/B0156R6VPY/ref=sr_1_1?ie=UTF8&qid=1487312635&sr=8-1&keywords=Accelero+Hybrid+III-120


i've used stock/modded/custom loops and AIO etc in the past, and i wouldn't think twice to use this,
over any custom setup.
unless someone is building it for "me"...
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fry178

fry178

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Rhinofart

Rhinofart

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I don't think you should use those parts. I'd get a larger reservoir, and a better, or additional radiator. Go with the 1/2" tubing as you want more water flowing over the waterblocks rather than higher pressure which you would get from the 3/8" tubing. 2 separate loops would be best, but that would mean an additional pump. What waterblocks are you considering?
 
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Unboundstorm

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I had entertained the idea of using more than one waterloop but with how expensive pumps/reservoirs/radiators are I couldn't justify the cost (especially with with $4000 pricetag already on this computer). I did change out the radiator after discovering that it's zinc coated inside of it. (if you didn't know, zinc undergoes a redox reaction very quickly, causing it to wear away very quickly).

One of my main concerns with the current build that i slated out is that the CPU may end up getting too much flow compared to the GPU's. I'm considering buying a ball valve to throw in before the CPU to allow a slight amount of throttling to it. Either that or simply heating up the tube right before the CPU and (slightly) crimping it down to cause more flow restriction just prior to the CPU, forcing more fluid to the GPU's.

Right now I'm going to be using the Phanteks 1080 waterblocks and a thermaltake pacific copper waterblock for the CPU.
 
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Rhinofart

Rhinofart

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You need not worry about the amount of flow going to the CPU compared to the GPU. They are in a closed loop, meaning the same pressure, flow throughout. The pressure inside the loop will be the same all throughout.
 
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fry178

fry178

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and you do want them in series. otherwise its nothing else than 3 different cooling loops in one, which you can built cheaper by going with 3 separate loops (AIO for cpu, 2 arctic for gpu), besides having the need for another reservoir before the rad, that catches the return from all 3 blocks.
 
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Unboundstorm

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@Rhinofart- i understand that the pressure will be the same but that doesn't mean the flow will be the same. (Ive studied flow dynamics)

@fry178- i dont want to do an all in one and I'm planning on doing themy in parallel. Also, I don't see how that would be cheaper to run an AIO because I'd pay for the pump/rad regardless. Adding a CPU to the loop only adds a CPU block and a few fittings.
 
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fry178

fry178

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Dec 14, 2015
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because you will end up with about the same cost (maybe less), but less problems,
as one component failing will not take down the whole rig.


a good cpu-AIO (non EK) not based on asetek design, will go for around 90$
https://smile.amazon.com/dp/B013WAY9UQ/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2DSDNRT3KLLAR&coliid=I14FVYKXIWB32N&psc=1


gpu cooler with a 120 rad, about 95$ each

https://smile.amazon.com/ARCTIC-Accelero-Hybrid-Generic-120/dp/B0156R6VPY/ref=sr_1_1?ie=UTF8&qid=1487312635&sr=8-1&keywords=Accelero+Hybrid+III-120


i've used stock/modded/custom loops and AIO etc in the past, and i wouldn't think twice to use this,
over any custom setup.
unless someone is building it for "me"...
 
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