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What's wrong with my temps?

post #1 of 16
Thread Starter 
I've noticed that my temps seem to be a bit higher than when I installed the loop. Can you help me figuring out what can be the cause?

I've resat the GPU block but that changed nothing, so I have a few hypothesis:

CPU wise:
· Bad contact between IHS and CPU die. Cores #2 and #3 are considerably higher than core #1 (up to 13ºC in IBT). When idling, core #3 is 3-4º cooler than the rest, however.
· Bad contact between CPU block and IHS. I think it's unlikely, the Apogee HD has a great mounting system that usually gives similar temps between mounts.

CPU+GPU:
· Some acetal burrs might have fallen into the blocks when I installed the monsoon fittings and now have found home in the blocks' microchannels. That's my number #1 guess.
· Radiator not performing as expected.
· Fans not doing their job. Could that be caused by the rubber gaskets?

My setup consist of the following:
· Swiftech Apogee HD on a 3570k.
· EK VGA HF on a 6850.
· Phobya HeGrease TIM.
· Distilled water + 5% Swiftech Hydrx (perhaps something more than 5%).
· Swiftech MCR320-Drive R3 (integrated MCP35X pump).
· 3 GT AP-15 in push, using rubber gaskets. They are tuned down to around 1200rpm using an FC5v2.
· Masterkleer 19/13 transparent tubing.
· 6 Monsoon compression fittings, an EK PSC 90º, a Monsoon 90º plus 2 Swiftech lok-seal

extensions for the GPU block.
· A monsoon temp sensor on the reservoir (integrated in the top of the radiator).

Right now the ambient temp is 17.5ºC. My radiator-top temp is around 21.3ºC. Note that these probes seem to give readings with a high degree of variability.

I fire up Furmark and after 14 minutes, the GPU temp is 40 ºC, and the water temp is 26.4 ºC.
If I run the fans at high speed (1800rpm) and the pump at 4500rpm, the temps go down little: water temp 26.1, GPU temp 37ºC.

CPU:
After 4 Linpack runs with IBT (Problem size: 6402MB), my core temps peak at 87ºC, and water temp at 26.1.

What bothers me is that the air coming out of the radiator does not feel warm. I recall that was not the case with my old Phenom (same setup, but without the GPU block).

Temps summary (in ºC):
Code:
Temp DOA
Ambient temp    17.5    0
Idle water:     21.3    3.8
Furmark max:    40      22.5
Furmark Water:  26.4    8.9
Furmark* max:   37      19.5
Furmark water*: 26.1    8.6
IBT max:        87      69.675
IBT water:      26.1    8.6

Reseating the CPU seems problematic, I'd probably have to bleed and unmount everything, something I prefer to keep as the last resort.

Here are some pics:



Edited by cloppy007 - 3/5/13 at 2:56pm
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post #2 of 16
Your GPU temps looks fine to me. I'd be willing to bet that the CPU is so high due to back contact between the IHS and CPU die. Delidding will probably give you better temps.
Dumb question, did you remember to take the plastic sheet off the bottom of the CPU block before installing it?
How long have you had this loop running?
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post #3 of 16
Thread Starter 
Quote:
Originally Posted by morencyam View Post

Your GPU temps looks fine to me. I'd be willing to bet that the CPU is so high due to back contact between the IHS and CPU die. Delidding will probably give you better temps.
Dumb question, did you remember to take the plastic sheet off the bottom of the CPU block before installing it?
How long have you had this loop running?
Sure I did. As I said, the CPU block was previously used in another build. The loop has been running since... October IIRC.

I expect CPU temps to be high, since my chip needs 1.33v to be stable @ 4.5GHz. However, I don't recall the temps being so high, specially the GPU temps. I think they were around 36ºC when I installed the loop.

Is the water temp increase significant?
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post #4 of 16
I don't think the water temp is really a big issue. It's not uncommon for my water temp to hit 28C when running full load
The loop has been running a few months and increase in temps is something that just happened within a few days? Maybe something is clogging the CPU block causing the higher temps. I know it's ideal, but I would tear it all down and inspect the inside of both blocks for any blockages.
Radiator is also clear of dust build up?
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post #5 of 16
Maybe CPU IHS is concave. Ie not flat. If you lap it the chances are itl get better

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post #6 of 16
Thread Starter 
Quote:
Originally Posted by morencyam View Post

I don't think the water temp is really a big issue. It's not uncommon for my water temp to hit 28C when running full load
The loop has been running a few months and increase in temps is something that just happened within a few days? Maybe something is clogging the CPU block causing the higher temps. I know it's ideal, but I would tear it all down and inspect the inside of both blocks for any blockages.
Radiator is also clear of dust build up?
I know tearing it all down would allowed me to check for debris in the blocks, but it's really complicated and I'll be with no PC for a few days smile.gif Besides that, I'm planning on adding an extra radiator, but that depends on whether it would help or not.

Radiator is clean, I blow dust once a week.
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post #7 of 16
Thread Starter 
Quote:
Originally Posted by Pedroc1999 View Post

Maybe CPU IHS is concave. Ie not flat. If you lap it the chances are itl get better

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Today delidding is the way to go smile.gif

That's not the problem. I made 2 tests mounting the waterblock with different quantities of TIM and they both covered the critical area of the IHS and the patch was almost perfect.
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post #8 of 16
Quote:
Originally Posted by cloppy007 View Post

I know tearing it all down would allowed me to check for debris in the blocks, but it's really complicated and I'll be with no PC for a few days smile.gif Besides that, I'm planning on adding an extra radiator, but that depends on whether it would help or not.

Radiator is clean, I blow dust once a week.
I know that feeling lol it hurts. I've been putting off transferring my build to my scratch built case for the same reason.
An extra radiator can never hurt, but if that's not the main root of the problem you will continue to have higher temps. If you do end up adding another rad, that could be a good time to check for blockages. Other than what I've already mentioned, I'm out of ideas. I hope you find the root of the problem and get it fixed the easiest way possible thumb.gif
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post #9 of 16
"CPU:
After 4 Linpack runs with IBT (Problem size: 6402MB), my core temps peak at 87ºC, and water temp at 26.1."

Being as you've already tried reseating, that (huge difference in cpu/water temp) pretty much confirms you have crap contact between the die and ihs. I'm not recommending you delid, but it's either that, or lower the overclock/voltage. Your water temp looks fine.

Edited for clarity.
Edited by ForNever - 3/4/13 at 2:09pm
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post #10 of 16
Thread Starter 
Quote:
Originally Posted by morencyam View Post

I know that feeling lol it hurts. I've been putting off transferring my build to my scratch built case for the same reason.
An extra radiator can never hurt, but if that's not the main root of the problem you will continue to have higher temps. If you do end up adding another rad, that could be a good time to check for blockages. Other than what I've already mentioned, I'm out of ideas. I hope you find the root of the problem and get it fixed the easiest way possible thumb.gif
Thank you very much smile.gif
Quote:
Originally Posted by ForNever View Post

"CPU:
After 4 Linpack runs with IBT (Problem size: 6402MB), my core temps peak at 87ºC, and water temp at 26.1."

Being as you've already tried reseating, that pretty much confirms you have crap contact between the die and ihs. I'm not recommending you delid, but it's either that, or lower the overclock/voltage. Your water temp looks fine.
I'm not lowering the voltage, I only get these temps in IBT. They never go past 60º while gaming.

+rep both of you
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