Watercooling: Mini ITX Costum Loop Tips

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ybauens

May 27, 2018
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Hello together!

I just built my very first costume loop. Due to the fact, that it was my first loop I made some mistakes. As you can see on the picture below, managed to connect every part properly and everything looks fine.
But I made some mistakes, that have some bad influence on my temps.
For example, I mixed up the In- and Outlet of the Monoblock. Furthermore, EK suggest to use the upper port as a Inlet for the GPU.
But my biggest problem is the monoblock, because my CPU temps aren’t that good. About 35 – 40 while surfing in stock! And the CPU is delidded.

So could you give me some tips how you would make the loop in this case and with this components?
Imho, the way i conected the parts is on the esthetic point of view the best way. But i cant stand these CPU temps.

Here my specs:

Case: Fractal Nano S
Mobo: Asus Strix Z370I
CPU: Intel i7 8700K
GPU: EVAA GTX 1080ti SC2
RAM: 32 GB G.Skill Trident Z 3200Mhz
PSU: Corsair SF600

Watercooling parts from EK. (I'm aware that i mixed up in- and outled of the Monoblock)
D5 Pump standalone.
Alphacool DP Ultra

Thank you very much!
And I’m sorry, if there are some grammatical mistakes, I’m doing my best :p

Best regards


fQ0MpuB.jpg
 
Solution
rubix_1011
Getting your CPU block flow correct would be the first order of business, in my mind. It's hard to say if that is causing the issue or if there really is not a problem. Obviously EK have labeled the inlet/outlet ports for monoblocks for a reason which means they've tested running them both directions just to check during prototype testing and R&D.

For a delidded CPU, that does seem high for gaming...maybe even for 100% stability/load testing as well. GPU temps under 50C is very good, so I don't think you're having issues with flow rates.
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Rdslw

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Aug 1, 2017
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Interesting :) maybe just reversing the pump will help ? CPU is hot as its cooled by hot air from inside of case. Temps on your GPU should be perfect by this loop.
ALSO please provide configuration of fans. I see 2 in (front) and 4 out (back,top+ PSU) ?
 
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ybauens

May 27, 2018
21
0
10
Yeah, i thoght the same, just switching the In- and Outlet of the pump.
But in this case the pump would pump into the res. Isn't that a problem? Or waht do you mean with reversing?

And I'm quite sure, that the loop order of the components and radiators doesnt affect the temps in general. Doesnt matter on which position the rad is.
But my GPU temps are really very good! But my CPU temps are just bad because I use the Inlet as a outlet and vice versa.

And thats right, 2x 140mm in and 3x 120 out. All controlled via CPU header with a splitter.

Best regards

 
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rubix_1011

rubix_1011

Contributing Writer
Moderator
Jan 12, 2007
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Loop order does not matter as long as your pump is not able to pull in air, you are fine. This is why most people position the reservoir outlet to feed the pump inlet with the reservoir at higher position than the pump. DO NOT change the flow direction to push into the reservoir. A reservoir is designed to accumulate air that gets displaced out of your loop. Air is compressible, water is not.

Most GPU blocks are omni-directional meaning coolant can flow either direction and with the fittings positioned on either side and as long as you use an inlet port opposite of your outlet port (opposite left to right, front to back is fine).

I am wondering if you have some air still trapped in the system - with a loop design like that, you really have to make sure you purge all the air and the reservoir is on its side...meaning it is more difficult to leave it vented while filling the loop.

Assuming that your pump is first pushing coolant to your front radiator, it looks like out of the gate you have it snaking through several fitting bends...that's a good way to increase your flow restriction.

Also, monoblocks can be a bit tricky to get seated, but seeing your idle temps are 35-40C, that's pretty normal, depending on your ambient room temp (what is your ambient room temp?)

Not sure why you misplaced the inlet/outlet on the monoblock...this seems like a case of not paying close attention? Most monoblocks are designed to flow in one direction specifically...that's why the installation directions define which port to use for which.
 
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Y

ybauens

May 27, 2018
21
0
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@rubix_111

Thank you very much for this answer.
Yeah, I thought so.
But I'm still thinking that my CPU temps are way too high. After playing Overwatch 4k for one hour, the GPU hits not 50 C but the CPU gets to 67 C.
I'm quite sure that the reason for this are the mixed up In- and out port.

How would you recommend to change the loop, that i use the proper port? (Right side of the monoblock)

Thank you!

Best regards!
 
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rubix_1011

rubix_1011

Contributing Writer
Moderator
Jan 12, 2007
16,707
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Getting your CPU block flow correct would be the first order of business, in my mind. It's hard to say if that is causing the issue or if there really is not a problem. Obviously EK have labeled the inlet/outlet ports for monoblocks for a reason which means they've tested running them both directions just to check during prototype testing and R&D.

For a delidded CPU, that does seem high for gaming...maybe even for 100% stability/load testing as well. GPU temps under 50C is very good, so I don't think you're having issues with flow rates.
 
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