My CPU is hitting 120oC on Idle HELP

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leandrodafontoura

leandrodafontoura

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Sep 26, 2006
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I have used this gaming PC many times and played several games. 2 months ago, I moved to another apartment, and today I reconected my PC, after lefting in the corner for 2 months. I was only using my notebook and PC was OFF the whole time. Something happened, as on idle, temperature keeps rising till it hits 120oC. At this point, Intel shuts itself down. I getting this reading both on BIOS and on Asus temperature report in Windows.

As you can see from my avatar in the left, I use a watercooler. Fans are spinning and the pump is spinning, Im getting perfect readings on the pump as well. What happened to the CPU temperature?

Can it be the water evaporated? Can it be thermal paste got too solid over this 2 month period? I had previowslly left the PC 1 year without turning it on and had no problems then. I need help
 
Solution
bignastyid
The water block on the cpu may have got knocked loose and doesn't have good contact. You may also need to replace the coolant most them only last a year or two before it needs drained and replaced.
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zyky

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If you can't tell the water is actually flowing (or see water in the system), you may as well purge/flush/refill the system and perhaps even tear it completely apart and check for algae or sediment.
 
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leandrodafontoura

leandrodafontoura

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I thighen all screws. Anyways, I identified the water is not running in the system, my loop has a small glass compartiment that indicates the flow, and the thing isnt vibrating as it suposed to be. So the pump is spinning but water isnt flowing trough the loop.

Now, I could also see some "black" on the glass, and I remember it was suposed to be clean. Is this algae or simply paint from inside the radiator that spread? And if so, can algae really block waterflow? Are they really that strong? I believe water has evaporated, so Im gonna put more in and see if that resolves the issue. Im gonna take the oportunity to disassemble the loop and install a better more silent pump, should I do anything in the process to clean it?
 
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zyky

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Black could be algae or sediment from minerals in water or galvanic corrosion. They wouldn't paint the inside of the radiator.

A gunked up waterblock can easily stop flow, even installing some waterblocks backwards (input/output reversed) can prevent flow. But, so can an air bubble in the pump (and will make the pump louder than normal, while not being cooled properly).

Hopefully your waterblocks let you take them apart for cleaning if that is the problem. if there is an algae problem, you're probably better replacing the tubes and radiator then trying to clean it with biocide or bleach and flushing.

 
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leandrodafontoura

leandrodafontoura

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Well, got everything working, new pump installed, got the MCP-35x from swiftech. I decide not to do a complete cleaning and simply installed the new pump. Turns out there werent enough coolant in the loop to get it flowing, I had to put a lot back to fill the reservoir.

Now I am trying to find a nice cpu fan control application so I can slow downs the swiftech pump. Im gonna open a thread on it later, thanks for all the help
 
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