Asrock x370 Killer BCLK not stable

[sybreeder]

Hey

I've got an issue with my Asrock X370 Killer.
When i have it OCed basically to any multiplayer BCLK will not be on 100Mhz but rather on 98-98,5
like here:
https://valid.x86.fr/jfdxbg

Any ideas ?
I tried to set AM4 training on and off, set IOMMU, CnQ...
i'm on the latest bios - 3.40

Update...
Ah damnit.. i found a problem...
The reason that BCLK is not on 100 is because Hyper-V was turned on.
when i turned off from CMD everything is fine

 

[pendragon1]

that's a good tip. I've seen others have this issue and the last 1600/b350 system I put together ran at 99.5, I just ignored it