I've got a ASRock X570 Phantom Gaming 4 with a AMD Ryzen 7 3700X 8-Core Processor.
I'm running Windows 10 (v1903) and HWiNFO64 version 6.34-4300
When running HWiNFO the Motherboard temperature reported appears to be a rounded copy of the SB temp?
If I use the ASRock Phantom Gaming Tuning app...