I have a feeling that you cannot enable or disable HBCC with blockchain drivers. It is enabled or disabled automatically depending on driver or motherboard/cpu settings.
When you play with HBCC slider (switch) you just reboot some driver logic that causes the speed back to normal (high) if it went slow before for some reason ))). Hope you catch what I'm trying to say ))
Just look to release notes for more fresh 17.8.2 driver ))
Fixed Issues
- The "Reset" option in Radeon Settings Gaming tab may enable the "HBCC Memory Segment" feature instead of setting it to the default disabled state.
- Radeon WattMan may not reach applied overclock states on Radeon RX Vega series graphics.
http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-ReLive-Edition-17.8.2-Release-Notes.aspxI don't quite catch what you are trying to say. If you could be clear that would be great, be a champion of information.
If anyone knows of a way to compare the PCI-E lanes windows assigned to each GPU that would be great.