This has got to be about the strangest thing I have seen in all my years of building my PC's.
So earlier today, I loaded bios defaults and re-flashed the bios just in case mine had somehow got corrupted.
No difference.
So I went about lowering my target voltage first and stress testing in between, then increasing the vdroop.
I have now got the system about where it was core temp wise while stress testing to what it was previously.
However, my new target voltage in the bios is 1.05v. And my new vdroop setting is +75%.
My core temps while stress testing are mainly in mid to upper 60's with peaks in low 70's. About what they were previously. Viewing the voltage in CPU-Z, it bops around 1.32-1.36v whilst stressing. About where it was previously.
So just a couple of days ago, I had to run 1.24 target voltage in bios and had a vdroop of -25%, and it was stable and temps about as above.
Now, for some unknown reason, I have had to do the following to get about where I was:
Target voltage - from 1.24v - 1.05v.
Vdroop - from -25% to +75%.
Leaving it at my previous setting I was running, core temps all of a sudden were up much higher, likely due to higher voltage being suddenly applied.
Very strange, and one I will probably never understand...
Will be interesting to see what tomorrow brings.