interesting symptoms on 10700k

one of my 10700Ks has developed some new interesting symptoms....

I noticed that I was dropping GPU WUs. I tried lowering the OC on the rtx4070ti super, but nothing really cured the dropped WUs. Then the other day when I was using that computer for 3d printing (the computers main use is slicing and 3d modeling) I noticed that the CPU was reporting 100C. I stopped folding CPU and it dropped to 35C. Was it my AIO? Nope that seemed to be working. Digging further, only Cores 4 and 6 run 100C, the other 6 are elevated, but perfectly fine for folding. Slicing, which is CPU intensive causes those cores to get up to 90C.

For now, I am still using the machine as a slicer, but will probably swap it out for Gamma which is a much more powerful AMD CPU with an RTX5080. My slicer software is available for Linux. I was probably going to do this for the summer anyway, for the most part it will be only machine folding during the summer.

I guess my question is what could cause 2 cores to just thermally fail like that?

A similar thing happened with my Q6600s over the years. For most of the time all four cores were usually within a couple degrees of each other but over the last few years they were in use two of the four cores would run hotter than the other two. I could swap CPUs out and the same thing would happen. In the case of these CPUs I'm pretty sure it was the motherboard bending from having multi-pound hunks of metal known as heatsinks hanging from the motherboard.

With an AIO it's unlikely it's the same thing. I wonder if instead the solder between those specific cores and the heatspreader has become disconnected. If this is possible it could mean there's now an air gap between the cores and heatspreader so the heat isn't being removed as fast as it is from the other cores.

ok um... well

so one starts with 1 the other with 0....so
0=1
1=2
2=3 etc

so my hot cores are 3, 5, and 7, and looking at the image from TechPowerup they are not remotely next to each other. Well 3 and 7 could be connected, but none are affecting the even cores, so why would 7 affect 3?

jfb9301 said:

View attachment 793016


ok um... well
View attachment 793018
so one starts with 1 the other with 0....so
0=1
1=2
2=3 etc

so my hot cores are 3, 5, and 7, and looking at the image from TechPowerup they are not remotely next to each other. Well 3 and 7 could be connected, but none are affecting the even cores, so why would 7 affect 3?

Click to expand...

Is there an equal load on all the cores simultaneously? If not it's difficult to make much of a determination here other than three cores are running hot.

That was post CPU FAH running on cores 3-8, with only cores 1-2 reserved for the system and GPU FAH.