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Need help with high core temps and tiny bubbles

post #1 of 6
Thread Starter 
Ok, I finally dove into water cooling after putting it off for a year or more and I think I've run into issues that require assistance.

Firstly, I must say building and testing the setup seemed rather easy. I was expecting a much bigger PITA than it really was. Maybe its the years of knowledge of building PC's and paintball that transferred well.

Anyway, here is my configuration:
HAF-X
i7 2600k
Asrock Z77 Extreme6
EVGA GTX 570
AX1200
5 hdd's (1 for OS / 4 in RAID10)

Water cooling parts:
- Swiftech MCR320XP
- Koolance CPU-380i
- Swiftech Maelstrom w/ dual MCR35 pumps
- Koolance QD3 quick disconnects at various spots
- Primochill LRT Adv hosing
- Silver kill coil
- IandH Dead Water biocide
- Indigo Xtreme thermal paste
- CoolerMaster Sickleflow 120 (R4C2R20ACGP) fans in push config
- distilled water

I ruined the first batch of Indigo TIM when I ruined my Z68 mobo (bent socket pins). So I replaced the mobo and reapplied. Not sure if the 2nd application took well because I was busy with other things and the temp profile didn't match with what they provided for proper reflow.

Anyway, here are my 2 biggest problems:
1) I'm getting lots of tiny air bubbles in the system. Not large bubbles, tiny bubbles from turbulence. I've tried completely filling the res but it just seems to constantly create new bubbles unless I turn it down to a level 1 in via motherboard PWM (scale 1-10). I've heard soap can help but it leaves a film on everything, so I'm not interested in that solution. Any other ideas?

2) When I run Prime95 to test the CPU at stock, my core temps run up to around 95C with the pumps running. That seems WAY too high for a liquid cooled setup, so I'm thinking the TIM didn't apply correctly but don't want to pull the waterblock in case it did. I'm more than confident in the fans on the rad and the flow rate of the pumps and I have zero leaks. I've tried tipping, rocking, and shaking the lines but I really believe that the water is swirling about inside the res due to the high flow rate. Will these only go away if I add more to the line such as GPU or mosfet? Are the pumps too powerful for such a small loop?

When I was running my Prolimatech Mega in push/pull config, I was reaching about 80C @ 4.8ghz. So I'm expecting much better and hope to push into 5ghz range at lower temps.
Edited by Lord Odin - 6/15/13 at 9:08am
post #2 of 6
you need to check your mount any cpu on any custom loop running over 65 degrees has issues
most likely you didn't take off the protective film on the cpu block
I would get some PK1 almost impossible to stuff up the mount and see what happens.

As for the bubbles if might pay to take a video but tiny air bubbles can take a day or two of running to completely disappear
kamikaze
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kamikaze
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post #3 of 6
tiny iddy biddy air bubbles will dissappear over time and end up in the res (You can just refil) make sure your block is on the correct way, The intake is going in the intake and vice versa or your temps will be shizen, Ontop of wich make sure your pump is running as described.
MEGATRON
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MEGATRON
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post #4 of 6
Thread Starter 
Ok, after removing the water block, look what I found:



The TIM didn't even reflow! So I reattached the water block (rotated it 90 degrees because I heard that this performs a few degrees better that way), disabled the pumps, and attempted reflow again. I ran Prime95 and monitored the core temps. I never saw the temp profile that they showed in the instructions, so I let it run for about 5 mins before finally shutting it down and letting it cool for an hour. I started it back up with the pumps and reran the test.

Before: 38-40C idle, 90+C load
After: 31C idle, 63C load

I don't know if how well it spread but it definitely looks like it took this time. I think I made the mistake of having the pumps running last time, so the TIM never melted. Those temps aren't duration tests (about 5-10 min) but definitely show a difference and the pumps are barely running to keep those temps, too.

The bubbles have reduced a lot but time will tell if they go away completely. I'll let you know for sure in a few days.

So I guess my last question is, can I remove the block at this point to inspect the TIM? Or will I have to completely clean the TIM and reapply if I do that? I just want to make sure its even spread. There doesn't appear to be any large temp differences between the cores besides a few degrees C. Just me being the perfectionist at this point.

Also, I've created a new problem. Last night, I changed out the compression fittings for quick disconnects on the Maelstrom res/pump and now the PWM control from the mobo isn't working correctly. The pumps won't drop below 3000 rpm, which is decently noisy. I've tried setting the target temp and target speed for the CPU fan to its minimum but even when the idle temp is below the target temp, the speed does not drop. The only way I can drop it is with SpeedFan. That seems unnecessary considering it was working fine with the compression fittings. In total, I have 6 connections with Koolance QD3 quick disconnects in the entire loop.

If the temp is below target, why would the pumps be working that hard? Any thoughts on what the cause might be or how to fix it?
post #5 of 6
That's good news you sorted the temps.

I think you need to set your target temps a little higher as if you set them for 40* for example the pump will run flat tack till you reach 30*
so you might need to set your target a little higher ie 70*
kamikaze
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kamikaze
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post #6 of 6
Thread Starter 
I thought about that before and tried maxxing out the target temp in AXTU but it had no effect on the pump idle speed. It only allows 45-65C as a target.
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