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CPU temperature doesn't return to normal once goes up

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  • CPUs
  • Intel
  • Temperature
Last response: in CPUs
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May 16, 2013 7:08:40 AM

Hi Guys, I have an Intel Core i7 2600K installed on an Asus P8Z68 motherboard and separate video card. The idle temperature is around 28-30 degrees stays that for hours even when I surf the net or do some word processing. Then suddenly it goes up to 50-55 (sometimes because of a little heavier use, sometimes for no apparent reason) and stays there until I switch of the computer. If I reboot a little later, it is cool again, but never return to 28-30 even it is idle for hours. A few weeks ago I changed the cooler on the CPU from the stock Intel to a Scythe B SCSMZ-2100, but the phenomenon stayed the same. Is my CPU faulty?
I'd appreciate any input as the fan noise kind of drives me mad...

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May 16, 2013 7:16:27 AM

probably your voltage setup goes up automatically for some reason (thinking that you already replaced the cooler and it didnt fix the temp)

go to bios and set your cpu voltages manually to a fixed point, dont leave them automatically. what you need to fix is VCore and QPI Volt. (preferably to its normal values if you are not overclocking, and you can find the values over internet probably)

i am assuming you have at least basic knowledge about the bios...
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May 16, 2013 7:25:37 AM

Make sure some background process hasn't started up that is keeping your CPU busy, like a spambot or other malware.
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May 20, 2013 4:15:58 AM

n1ghtr4v3n said:
probably your voltage setup goes up automatically for some reason (thinking that you already replaced the cooler and it didnt fix the temp)

go to bios and set your cpu voltages manually to a fixed point, dont leave them automatically. what you need to fix is VCore and QPI Volt. (preferably to its normal values if you are not overclocking, and you can find the values over internet probably)

i am assuming you have at least basic knowledge about the bios...

Thank you for the idea. I changed some settings in BIOS but interestingly enough things worked the other way round. The voltage was always fixed around 1.2V and the core speed fixed over 4000Mhz before. Now, the voltage fluctuates between 0.9v-1.2v and the core speed 1600Mhz-4000Mhz. I don't know what this means exactly, but the temperature now doesn't really go up and when it does it comes back to around 32C after some time.
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May 20, 2013 5:24:02 AM

zdenes3 said:
n1ghtr4v3n said:
probably your voltage setup goes up automatically for some reason (thinking that you already replaced the cooler and it didnt fix the temp)

go to bios and set your cpu voltages manually to a fixed point, dont leave them automatically. what you need to fix is VCore and QPI Volt. (preferably to its normal values if you are not overclocking, and you can find the values over internet probably)

i am assuming you have at least basic knowledge about the bios...

Thank you for the idea. I changed some settings in BIOS but interestingly enough things worked the other way round. The voltage was always fixed around 1.2V and the core speed fixed over 4000Mhz before. Now, the voltage fluctuates between 0.9v-1.2v and the core speed 1600Mhz-4000Mhz. I don't know what this means exactly, but the temperature now doesn't really go up and when it does it comes back to around 32C after some time.


it is actually normally how its supposed to be. you had 2 options. either set your cpu to work on low frequencies with low voltages when its idle or not really pushed, so it will cool up easily when idle. or to set your voltage lower than what it supposed to be so it doesnt get hot even when its pushed.

im glad it worked :) 
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