Update: the other contributors to this thread are all correct, and my responses above aren't well informed. Apologies for that, and thank you to the others who are trying to leave meaningful info in the forum.
In doing a google search for 13900k and aio 120, this post actually features toward...
Thanks for the suggestion. Sounds like my actual experience of monitoring it day-to-day isn't sufficient evidence for this forum. In any case I'm very happy with the machine and the service from PCS. I'll leave it at that.
No issues on my end with it. The package runs in the mid 70s and spikes to low-mid 80s during some benchmarks and the VR development I'm doing. Normal tasks and high end gaming have nice medians at or below that. A few alphas that are poorly optimised can run the CPU load unusually high, but...