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New waterblock diminishes liquid flow by a lot - advice needed

post #1 of 10
Thread Starter 
Hello guys,

i had an old waterblock with one inlet and two outlets and i decided to buy a new one to get rid all of the extra tubing.
I bought the phobya uc-2lt which is paired with my old wc setup: phobya dc-400, universal gpu block, one 120mm and one 240mm radiator. Tubing and barbs are all 11mm ID, and barbs are g1/4 with 5mm thread.
On the first start up the temps were skyrocketed; up to 100oC on with my 4790k delidded @ 1.3V. At that point, i noticed that the water inside the reservoir looked still where with my old wb you could easily see the turbulences caused from the pump.
I checked the pump and it works fine. I have reseated the wb and i validated that it contacts very well with the cpu. I removed gpu block and the 120mm radiator and cpu temps are marginally better -
the water inside the reservoir still looks immobile. And i am wondering if that is normal or if these phobya blocks restrict so much the liquid's flow?

TIA for your answers.

EDIT: Problem was solved after dismantling and cleaning the wb. Here is a picture of how it was before cleaning, were alot of residues had blocked the wb's flow restrictor:

Edited by melodystyle2003 - 5/21/17 at 2:38am
post #2 of 10
Quote:
Originally Posted by melodystyle2003 View Post

Hello guys,

i had an old waterblock with one inlet and two outlets and i decided to buy a new one to get rid all of the extra tubing.
I bought the phobya uc-2lt which is paired with my old wc setup: phobya dc-400, universal gpu block, one 120mm and one 240mm radiator. Tubing and barbs are all 11mm ID, and barbs are g1/4 with 5mm thread.
On the first start up the temps were skyrocketed; up to 100oC on with my 4790k delidded @ 1.3V. At that point, i noticed that the water inside the reservoir looked still where with my old wb you could easily see the turbulences caused from the pump.
I checked the pump and it works fine. I have reseated the wb and i validated that it contacts very well with the cpu. I removed gpu block and the 120mm radiator and cpu temps are marginally better -
the water inside the reservoir still looks immobile. And i am wondering if that is normal or if these phobya blocks restrict so much the liquid's flow?

TIA for your answers.

If its 100°C something is definitely wrong, i can do the same with my D5 pump if i run it below 30%. I'd say up the speed of your pump a bit and see if it changes your temps. For my its my gpu block thats restrictive so i need to run my pump at least 50% to get decent temps.
    
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post #3 of 10
Could it be air trapped in the block?

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post #4 of 10
Thread Starter 
I think i have removed all the air from the water circuit. Pump operates with low dc at low temps and is set to 100% dc when cpu is over 55oC (according to tests dc12-400 flows ~250lt/h with a wb and a 360mm radiator).
post #5 of 10
How are your rads mounted?

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post #6 of 10
Thread Starter 
Guys thanks for your inputs. Today i dismantled the wc setup and i noticed that some remainings from my old wc setup have blocked the restrictor's water pass. I cleaned it and wow i got ~45oC decrease. Max 55oC after one hour of prime stress test at 1.33v.
post #7 of 10
Quote:
Originally Posted by melodystyle2003 View Post

Guys thanks for your inputs. Today i dismantled the wc setup and i noticed that some remainings from my old wc setup have blocked the restrictor's water pass. I cleaned it and wow i got ~45oC decrease. Max 55oC after one hour of prime stress test at 1.33v.

Yea that'll do it, i just figured everything was new. I probably should have read your post better haha. Even after cleaning my wc parts i still had some paint/crud get stuck in my cpu waterbock, had to open it up 2-3x to get it fully clean, the system is fully clean now nothing is in the fins.
    
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post #8 of 10
If you had buildup in the system, I would take it apart again and make sure that nothing worked its way into the cpu block. If anything broke loose, it could clog the block up.

That phobya uc-2lt is one of the most restrictive blocks available. It has good cooling performance, but very restrictive. I have one, and while I had a raystorm in the loop, the pump would constantly suck air when over 60% with the uc-2 water shows much less turbulence. Temps are good though.

I got mine with a kit that I bought just for the radiator and wanted to test it out. Using mcp35x pump, in addition I added the phobya dc-220 to the loop, with a 400 xtreme radiator just to help filling and to add a little more head to keep flow up with the restricted block.
post #9 of 10
If nothing else helps, you can build bench test with just the new waterblock, the pump, and a bucket. You'll see what kind of flow you get. Then take it from there.
post #10 of 10
Thread Starter 
I do think that this block is restrictive in an extended degree, although the temp reduction it achieves is quite good. Maybe i will hook up another dc12-400 pump together with the 120mm rand and the gpu block now.
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