Most likely thats the best core and its using that one for the cpu boost and for most of the work. Mid 60's for a idle temp, for that chip, with a triple rad is def a concern though, thats high like the pump isnt working. That needs to be looked into more and make sure the pump is working. Until you get the pump and cooling situation fixed its going to be hard to diagnose other things down the line.

Here's the deal, Ive had this chip at 4.7GHZ stable for about 4.5 mths. It never really went above 65-70 and that was full load on cpu. Now its idling at that temp. The corsair iCue software says the pump is running, however when I feel the pump on the cpu its is barely warm at all, shouldn't that be almost hot to the touch? I have voltage set on auto so I know its not getting high voltage for cpu. I'm thinking its bad pump, any other ideas on how to test that theory without me just going and getting another one?

NVRLA-That is the culprit! After looking again at task manager I noticed this had a decent ping on cpu resources. I did some research and found out this is a known issue with the new nvidia driver package and its some learning thing they put in. Once I cancelled this I watched the CPU temp plummet almost 15-20 degrees. Have my OC back rock solid stable at 4.7GHZ all core now! idling around 40-45 so thats pretty awesome for a big hot chip like the i9-10940x! Thanks for all the help folks!!!

jumblo
I did some research and found out this is a known issue with the new nvidia driver package and its some learning thing they put in. 

Which version of Nvidia driver you are using, please, and what exactly you did with it?

jumblo
using the 471.11 driver, basically the only way to get the stupid thing to stop is to go into task manager and end the process.

But which process exactly did you stop, please? I am asking because I tried 471.41 and I didn't see it consuming CPU, I saw it writing often to nvtopps.db3 and its journal that went away when I went back to 466.77.

jumblo
I attached a screen shot, you will see this process in Task manager. At this point because Nvidia hasn't changed it yet, I have to manually end the task each time I boot up.

 
Thank you! NVRLA is part of GeForce Experience. That explains why I haven't seen that issue, I never install GeForce Experience, I install just drivers. If you don't want to keep ending that task manually every time you boot you might want to reinstall your drivers, this time doing clean install of just drivers, without GeForce Experience.