Thanks for the important picture, may cpu is B0 stepping and the temp in ipmi is not as high as the die average, from you picture I see your CPU also high in this die average temp, so I think it's probably because of the ES stage CPU.
The SoC max power on my system is 20w, I think it's because the 8ch memory controller, so I ran some CPU heavy but no memory usage program, with this program the SoC only consume 9w, so I said it's idle
I recently purchase a 7452 QS 57-04 on EPYCD8, 8x16GB 2400.
And I found that some temperature in HWInfo64 was ridiculous high:
As you can see that "CPU Die (average)" was around 72°C and when I run the Prime95 torture test it'll quick raise up to 100°C (TjMax), but the CCD temp seems pretty low...