Old CPU in an old system getting very hot suddenly.

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sram

[H]ard|Gawd
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Jul 30, 2007
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This is an old 2700K Sandy bridge CPU in a 13 years old system. I had it overclocked to 4.9 GHz for few years before I had to cancel the overclock because it wasn't stable anymore. The ASUS mobo I bought with it went bad and I replaced it with this one:
https://www.gigabyte.com/Motherboard/GA-Z77X-UD5H-rev-10#ov

The replacement mobo auto-overclocked the 2700K to 4.5 GHz. It was stable when stress testing with this new mobo so I just kept it. Few days ago, I noticed that the PC is getting really hot specially under load. I fired coretemp, and the core temps were like in the 40s. However, the second I start intel burn test the temperature on all cores climbs to ~ 95. Nothing changed recently with the system. I'm using a corsair AIO with 3 fans as a cooler. The summer where I'm is hot so that's may be a factor. What do you think happened? What could cause this?

I don't think something is wrong with the cooling.

My thinking (Conclusion): The CPU degraded even more and now can't stand high frequencies anymore. Could this really cause a cpu to run hot? When it was brand new, it idles at ~35. When stress testing it reaches ~65 fully overclocked.

Solution: Cancel the overclock and see what happens. I'll do this soon. It may get better but I think it will still run hot.
 
In my experience, the #1 reason to avoid "auto-overclocking" features, especially on those generation of motherboards, is because they often crank-up the voltage way too high. What is CPU-Z showing as your CPU voltage under load?

It may have "degraded". The main way that you will degrade a chip is by pumping way too much voltage into it... It's fully possible to have maintained an aggressive OC on a chip for years without degradation as long as you have the voltages dialed in reasonably. I have a 2700K in my retro computer / spare computer and it's running at 5.2Ghz just using a Thermalright Frost Spirit 140 air cooler. Of course, I'm only using just as much voltage as I need to in order to keep that stable.

The other possibility is that there is a small leak in your AIO. Not enough to drip liquid into your system but enough to allow coolant to evaporate at an accelerated rate, until eventually you're cooling your CPU using nothing but your waterblock.
 
GotNoRice said:
In my experience, the #1 reason to avoid "auto-overclocking" features, especially on those generation of motherboards, is because they often crank-up the voltage way too high. What is CPU-Z showing as your CPU voltage under load?

It may have "degraded". The main way that you will degrade a chip is by pumping way too much voltage into it... It's fully possible to have maintained an aggressive OC on a chip for years without degradation as long as you have the voltages dialed in reasonably. I have a 2700K in my retro computer / spare computer and it's running at 5.2Ghz just using a Thermalright Frost Spirit 140 air cooler. Of course, I'm only using just as much voltage as I need to in order to keep that stable.

The other possibility is that there is a small leak in your AIO. Not enough to drip liquid into your system but enough to allow coolant to evaporate at an accelerated rate, until eventually you're cooling your CPU using nothing but your waterblock.
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Thanks for your nice reply. I cancelled the overclock. It now spikes to 75 degrees under full load. When stressed using CPU-Z itself it shows core voltage of 1.344 V. In the BIOS I think it was 1.392 V if I remember correctly. Is this too high for a 2700K ??? It is amazing that you are still maintaining an overclock of 5.2 GHz with a 2700k until now. Has it been running like this since launch (I think it was 2011 or something). What's your Vcore? When this cpu was overclocked to 4.9 GHz, it was using a custom loop with 3 fans radiator.
 
I wouldn't bother as it is fine now. I think I used thermal grizzly when I did it last time.
 
Lol at bumping a thread from August.

As for the voltages, 1.39 isn't bad for Sandy bridge. I've seen plenty of people push 1.5v through them.
 
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