I can't get my vega vii to work with my nvidia cards 2080 rtx.

When i added the vega vii it initially detected the unkown hardware,  I flashed the bios with v106 x64,  Then i installed the latest drivers adrenaline 19.3.2 march 14th.

My device manager finally read it as vega vii but had this symbol "!" ,  So i thought it just needed a reboot,  I rebooted it and now i can't get anything to load up,  Not even my motherboard settings.   The screen shows a large underscore "_"  on the boot screen   .  And just stays stuck there and does not load windows or anything.

Any ideas on what I should try? Thanks