CPU Temp Over 100C

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Keith S

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Jan 18, 2014
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Hello,

I have an Intel Core i7 2600k that is reading consistently above 120c (up to 125 typically). I am fairly certain that this is an incorrect reading as I kind of doubt that the CPU could actually operate at such a high temp. Also, the heat sink is cool to the touch.

I do have reason to believe that there is damage to either the mobo or the CPU. When I noticed these high temp readings, I opened my case and saw that the CPU heat sink was completely clogged with dust. My theory is that the CPU got hot enough to cause some damage at some point recently and how it's ability to accurately relay it's temp is broken.

My question is, do you think the CPU OR the motherboard are damaged? I'm not sure where a CPU's temp is sensed from. On board the chip itself, or somewhere nearby, like in the socket etc etc. I'm trying to decide one can be replaced as opposed to both.

The only performance issues I'm noticing are that when I play current graphic intensive games, they stutter and lag, where before this problem, they didn't use to.

Thanks!

PS - Just noticed that my HD1 temp sensor is reading at 128 deg C. I'm not aware of where this reading would even come from. I have a SSD. Something strange is definitely going on. These temps are reported by SpeedFan software AND the system BIOS.



 
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lobaman

lobaman

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Nov 22, 2011
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Cpu temp sensors are located on the motherboard i believe, even if the sensor is faulty the recent lagging in games could be a sign of cpu throttling due to high temps. Try cleaning out your cpu heatsink and reseat it
 
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Ironsounds

Ironsounds

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Jul 31, 2011
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Hello... is this a pre-built computer? or did you install the Fan/Cooler/CPU? Is it a Push PIN or Screw down Mounting? I would first disassemble your CPU/FAN Cooler for a inspection of the mounting to the MB and also inspect the condition of your thermal paste... it should wet and not Dried out for best thermal conductivity.
The CPU sensors are in the CPU.
What program are you using to detect the temperatures?
Are you sure they are reading degrees C?
 
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K

Keith S

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Jan 18, 2014
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Hello and thanks.

I should have added in my original post, all cooling hardware was inspected and found to be in good working order. Heat sink is firmly seated and the thermal paste was fine but replaced it anyways for good measure.

I'm using a freeware app called SpeedFan to sensor readings in addition to the readings in my BIOS.

I built this rig myself about 2 years ago. I'm shocked and a little bummed to see that the 2600k is still well over $300. Hoping to not have to replace it.
 
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Keith S

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Jan 18, 2014
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oh! And now I'm seeing it read (minus) - 60C in SpeefFan where is just 30 seconds before was 40C in BOIS. So it begs the question, which is fried, MOBO or CPU?
 
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Keith S

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Jan 18, 2014
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Thanks for that software link. I have some numbers: With the PC basically idle, my core temps are: 37 38 37 38. While running the Prime95 test, the numbers average 92 96 97 97, maxing out at 93 97 98 98. (Images: http://imgur.com/a/0jFwU)

Interesting, these temps are way of from what that SpeedFan software reads. Perhaps there's a compatibility issue there. Keep in mind that I have seen the CPU temp in my BIOS at well over 100 degrees C.
 
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lobaman

lobaman

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Nov 22, 2011
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Maxing out at 98??? that's pretty high man even overclockers don't want to go that high, a ok overclock max out is around 60-80 but i don't assume you're overclocking?
 
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Keith S

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Jan 18, 2014
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That's the issue here. I am not overclocking at all. Running this completely stock. This just started happening out of the blue.

It was tricky, bit I have verified that even the CPU itself it fairly cool to the touch less than 10 seconds after reading at 98. This has got to be a sensor issue somewhere.
 
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lobaman

lobaman

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Nov 22, 2011
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Re seat your heatsink and if your thermal paste is all dried up clean it and put some new paste on
 
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Joelsjet

Joelsjet

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Jun 13, 2011
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Mmm that's a weird one, normally speedfan is great at measuring temperatures. But all in all your right something is broken,you stated earlier that your HD Drive temp is at 120C well i find it hard to believe that the temp sensor in your HD and CPU Failed at the same time and therefore maybe not a hardware problem .Seeing as you have already resetaed the heatsink and changed thermal paste I would check for any Bios updates, flash them on and then see what happens, if this doesn't help then i would bet on a the mobo being fragged and send it back if still under warranty.

Cheers,
Joel
 
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Ironsounds

Ironsounds

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Jul 31, 2011
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Hello... Check your PWM settings in your Bios for your CPU fan... What voltage is your CPU set at? You could need a case Fan or change the direction of the air flow of your case fan... You may need a different Better/faster Fan and or Cooler for your CPU... Good thing is it seems your CPU temperature senors are all working and reading with your MB.
Are you running a turbo mode in your MB?
Turn on Speed Step on your CPU?
Try a water Cooler with your Case and CPU?
 
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K

Keith S

Honorable
Jan 18, 2014
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10,510
I had to share the grand finale of this ordeal. Still unable to find an 'easy' solution to my overheating issue, I decided to buy a new heatsink/cooler unit. The new unit was the type that required that the entire motherboard be removed from the case so a new back mounting plate could be installed to secure the new heatsink assembly. Before removing the mobo, I thought it would be helpful to just take a couple quick snapshots of the motherboard with my phone, so reassembly would go smooth. I thought to myself while taking the pics, "I better cover the CPU socket with the socket cover ASUS was kind enough to provide me with". Then I said, "naw, I'll be careful" and went on to take some photos. Moments later, the phone slips out of my hand and falls right into the CPU socket corner first and bends probably about 15 pins.

tl;dr. Stupidly destroyed motherboard while taking photos with a cell phone during a heatsink installation. Anyhow, thanks for all your help and suggestions. I purchased an OEM version of this mobo on ebay for $60. Hopefully that solves the issue.

Oh, and ALWAYS use your CPU socket cover.
 
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