I'm about to tear my hair out. I have been fighting with these damn VEGAs all weekend!

After nearly a dozen hours I have a single Vega card working in my board.

Fresh install of Fall Creative Update
Aug 23rd Blockchain Drivers
XMR CAST 0.6

HBM: 990MHz

Mining XMR at 1,400h/s

Does anyone have any ideas why I'm so low?