Anyone experience issues with manually resetting their Vega cards in device manager?

I  cannot re-enable my Vega 56 in device manager after disabling.  Toggling HBCC in Wattman causes the driver to crash and the card is missing from Wattman.  The only way to fix this is to reboot the rig.

Using the latest Aug23 block chain drivers in Windows 10 x64 with latest creators update 1709 (have tried previous Windows 10 builds with similar results)

The only driver that allows me to reset the cards is the latest 17.11.1 driver but from what I can tell this is not the optimal driver for mining.

Only getting a max hash rate of 1300H/s using cast-xmr from a single Vega 56 when others are getting much higher.

Spent 2 days so far with no luck.

My system specs
Motherboard: Biostar TB250-BTC
Memory: 1x8GB
CPU: Celeron G3950
Video cards: Just a single Vega 56 + integrated GPU
Virtual memory: Fixed at 64GB

Any help appreciated.