CPU-Z is often too slow for me but I can see it in the power draw and especially monitoring VRM temperature in HWINFO. Sudden drops are a good indicator
The CPU can run 5 GHz on Apex with H100. So if it can only run 4.5 or 4.6 on a different board it's for sure not the chip or cooler The CPU is delidded with liquid metal
Just ban Gigabyte boards for using old AGESA and make mainboard tab mandatory for AM4 submissions. Not sure about MSI or ASRock but it's not possible to do this on ASUS.