Hello,
I´m using Windows 10 Pro with Hyper-V.
When Hyper-V is enabled, HWInfo shows a BusClock and PCIe Clock between 98 and 99 MHZ, and not 100 MHZ.
With CPU-Z it´s the same, but I can change a setting in the ini-file and then CPU-Z shows 100 MHZ, please take a look here...