Strange CP behaviour on liquid cooling

xNAPx

xNAPx

xNAPx

Associate
Joined
18 Feb 2021
Posts
54
Hi guys I have a problem with my cpu In practice, I changed case and reassembled everything, in doing so I had given the gpu a repaste , but the cpu practically did not touch it (so it remained with the heatsink attached from the other case), when I go to reassemble everything I do a cinebench and everything is ok as always with the cpu, then I start a game and the temps of the gpu skyrocket, I practically realize that I was wrong to repast the gpu (I put some liquid metal), I put too little paste, then I have practically disconnected the pipes of the gpu only and removed only the gpu to ripaste it (losing part of the liquid of course), then I put the gpu back, reconnected the pipes, filled the loop, and now it is the cpu that has problems (why ??? I have not even touched it), the gpu has temp divine (40/44 degrees in full load), but the cpu behaves strange, in idle temp in the norm (32~33 degrees) , in game I would not know but I would say yes (I'm playing Gears 5 and the cpu is about 50 degrees, now I do not remember how it was before, but more or less I think we are there), I made a stress test with cpu z and temperatures are in the 80ties (perhaps already higher), but it is with cinebench that we are not there, in practice I register an increase of almost 10 degrees, touching 100 degrees on a couple of cores and on 94/95 on the intermediate cores and others on the 88/90 while before I had on average about 10 degrees less, and moreover it records me lower scores (probably because it goes into a slight throttle), but what the hell happened? Any problem with the liquid and the loop when I reassembled it? In fact I have a flow meter and it runs quite slowly but I don't know, but the gpu has no problems, what the hell happened?
 
Any chance of some pictures? It's hard to know what could be happening if you really haven't touched the cpu and its block but pics will definitely help.
 
I've now seen the pic in the gallery. You could add it to this thread.

Assuming the cpu block hasn't shifted.

1. Check for trapped air in the cpu block.
2. Check the BIOS for any possible changes for cpu voltage.

But it seems likely that something related to the cpu must have changed. If the block has no air and the BIOS is still correct, it leaves only the mounting as the possible cause. It would however have to be really bad to cause such a high cpu load temp.

If it were mine, I'd be draining the loop and removing the cpu block.
 
I don't see how the block could have shifted since it is tightned quite hard. It may be some air but how can I see that? How can I get rid of it? I have a flow meter and I must say it is hoing a bit slow, but the gpu does not have any issue, the opposite. Draining the loop not a chance, I already had to do this for the gpu, and doing it for the cpu again while I didn't move it at all, is an annoyance I don't wanna do. Regarding bios changes I doubt the suddenly changed automatically
 
I just doubt that's the issue here, I nust say on my previous rig top radiator was mounted externally probably the difference gere is thta6now is internal? Gpiu temp are super good and in game temp looks normal. If I do a stress test with cpu z temp are on the mid 80. It's just cinebench in particular the r23 version, the r20 version for the same temps gets me the same results as before
 
Basically what Mike said. First thing I'd be doing is remounting the cpu block. Maybe it hasn't been moved but fresh paste isn't going to do it any harm. Make sure your loop is fully bled. Looking at your system in the case gallery there is clearly air still in your loop. What is the front of your new case like? Is it restricting the air intake for your front mounted rad?

Also not wanting to sound too harsh but if draining your loop is too much of an annoyance then you should have stuck with air cooling.
 
Thanks for your reply
It is an annoyance since if I want to take out everything I have to dismount everything again, I might try to repaste it without touching the loop, harder but doable air has been sucked pretty much all as water level in the reservoir has lowered but for tge sake of perfection I think i need to try a repaste even though I use liquid metal and it doesn't dry up
 
Unless you have bled it since there is air in the tube that runs horizontally across the top of your case. That needs to be gone. Air is probably trapped in your radiators. You need rock, shake and pretty much flip your case upside down with the pump running to get the air out. That's what I do anyway :p. Just make sure the air in the res doesn't re-enter your loop
 
xNAPx said:
So you don't think is a matter of repasting the cpu? But if so why gpu temps are good?
Click to expand...

That's a good point. I would do both your personally. Air in the system has a negative effect on performance and as said before reseating and pasting the cpu block won't do any harm
 
Ok I repasted the cpu and nothing happened as prevented so definitely is some air blocked thinking of that, it happened when I took the gpu out and reinserted I tried to shake the case, pich the tubes, move the case around but nothing, I don't know how to get rid of it, maybe it will go by itself overtime unless you know an effective method
 
I will show you a video of my floe meter running, as you can see the motion is not fluid, if I lean the case seating with the front as the base the flow gets better, as soon as i put it back in normal stance the flow start being like this again
 
Last edited:
xNAPx said:
Not beautiful like many other rig here, but I'm proud of it

IJrh7o.jpg

IJraTi.jpg
Click to expand...

What pump do you have? Flow meter does look slow
 
It is a laing ddc plus + top mount. It is running at half power to reduce the noise. Honestly it's always been running like this and never had a issue till now, tge only thing I can think of is a air bubble very big and stubborn
 
Run the pump at full speed. Open a port at the highest post of the rig (if you have one), rock the hell out of the rig. That's what i do to get rid of all the bubbles. Usually get the odd few getting stuck inside the blocks itself. I too have a flow meter in mine and running my DDC <30% the flow meter stops as if its not working (but actually is).

Otherwise, to make sure i'm not going crazy, bleed the full loop, dismantle the blocks and clean any crud in there, then remount/repaste etc etc. It's a pain but having a custom loops requires maintenance and is part of the process
 
You must log in or register to reply here.
Back
Top Bottom