Thanks for the quick response!
I did use the curve optimizer (-10 most cores, -5 favorite cores), and my CPU runs right up to the stock PPT of 88W at 92c.
I thought the 7800x3d was specced at 120W TDP...
Wow!
Stupid question: I care barely cool a Ryzen 7700 non-X (65W TDP) with the same cooler, but you use a 7800x3d (120W TDP). Makes me wonder if there's something fundamental in setting up things that I'm missing or doing wrong.