I had a 12600k for a week and it was ice cold.
Using a 14900k now. Oced to 5.8 all core it gets really hot and voltage hungry. At stock 60/57 I could lower volts such a great deal that it too is running much cooler than my 13900k.
From 5.8 all core to 5.7 my mobo prediction was a difference of 0.05v core but I dropped it 0.12 and so far so good. Runs quite cool. Can be made cooler with power limits.
On cinebench? You’ll have to set the priority to high and disable real time protection. You’ll have a better time seeing those clocks on Occt.