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Overheating CPU with WaterCooling

C2G -  
 C2G -
Hello,
For some time now, my CPU has been averaging 80°C even when idle, and with the high temperatures, it even exceeds safe limits, causing the PC to shut down.
Yet I have a water cooler with new thermal paste.
The tubes of the water cooling system are hot to the touch, the fan is running well and blowing out fairly warm air, I can feel vibrations when touching the tubes, but the part attached to the CPU does not vibrate and is silent. I can't seem to find any software that would allow me to check the settings of my water cooling system.
My graphics card is running around 40°C.

Can you help me understand if there is a problem with the water cooling?
What can I do?
Thank you

CPU: i7-930
Water cooling: Antec Kühler H2O 620
GPU: GTX 970

2 answers

  1.
    luckydu43 Posted messages 4497 Registration date   Status Member Last intervention   1 177
     
    Hello.

    The pump is not running.
    Check its connections; if it doesn't change even with another outlet: the pump is dead, bye bye the toilet.

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  2. flo88 Posted messages 28486 Registration date   Status Contributor Last intervention   Ambassadeur 5 168
     
    Hello

    An i7 930 is quite old...
    Given its age, the thermal paste located under the IHS (which makes contact between the IHS and the die) is probably very worn out, to say the least. There is a solution: delidding...

    A recent topic that explains this:

    https://forums.commentcamarche.net/forum/affich-36788889-i7-7700k-surchauffe-apres-delid#p36790871
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    1. C2G
       
      Hello
      Thank you for your responses.
      The thermal paste on the WC-processor side is new, and while decapping seems necessary, it also seems a bit complicated.
      The problem might come from the pump; I will do some tests, but I don't see how to be sure.
      2
    2. luckydu43 Posted messages 4497 Registration date   Status Member Last intervention   1 177 > C2G
       
      It should vibrate when you press your hand against it.
      That's what immediately put me on the track: "the part glued to the CPU doesn't vibrate and doesn't make noise"
      The "part glued to the CPU" is a water block-pump. If it doesn't vibrate, it isn't running.
      A pump operates at a high speed (between 1500 and 2500 rpm depending on the models). It vibrates.

      From there, the cable powering the pump must be connected to a standard fan connector (from the motherboard or power supply via an adapter).
      Change the connection. Use the fan header that a working fan uses.
      If it still doesn't work, the pump is dead.
      It's a known issue, not necessarily common but known. Especially if your WC is from the time of your CPU. It had a good run.
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    3. flo88 Posted messages 28486 Registration date   Status Contributor Last intervention   5 168 > luckydu43 Posted messages 4497 Registration date   Status Member Last intervention  
       
      If the pump is out of order... It's definitely not working as well; -)
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    4. C2G > luckydu43 Posted messages 4497 Registration date   Status Member Last intervention  
       
      What is strange is that the heat exhaust grille as well as the pipes are hot.
      My toilet is connected to the fan_CPU socket on my motherboard directly and not to the fan sockets.
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    5. luckydu43 Posted messages 4497 Registration date   Status Member Last intervention   1 177 > C2G
       
      It doesn’t matter. We can plug a fan into the FAN_CPU socket and the pump elsewhere.

      If the water cooling works while the CPU is running at 80° at IDLE, there’s a problem.
      Either the thermal paste is incorrectly applied (or the internal thermal paste in the CPU isn’t working), in which case the CPU overheats and the WC is cold (which is not the case),
      or the thermal paste is applied correctly, the WC heats up, and the CPU runs at 40° at IDLE (which is not the case),
      or the thermal pastes work well, the WC heats up, but the CPU runs at 80° at IDLE. In this case, the pump isn’t working.

      I can’t make it any clearer.
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