Hard reset does nothing. I tweaked xml and can get the VM started now... but no signal. I wonder if the card is blow... though I would imagine it wouldn't enumerate in system devices if that was the case. Super bizarre (and frustrating)
EDIT: ~~Something is borked... now I started from scratch, and on first start... VNC just hangs.~~
EDIT2: ~~what would cause a single VCPU to peg @ 100% and log to hang changing the state of the network adapter br0 ?~~
EDIT3: VNC viewer lets me hit the clover boot loader
EDIT 4: Dear Jackass (me): K.I.S.S. (Keep it simple stupid). My 8pin was not seated all the way (I added a new 2070 a month+ ago, and hadn't fired up my macOS vm since). Hence, enough power to announce, but not enough to enumerate. I suck. Sorry everyone.
EDIT 5: Back to square1. All VMs using the Radeon are hanging at boot. Got it to boot once after re-seating, but that's it.
I am not sure why or how, but the BIOS of my card got nerfed. After trying several revision of actual BIOS, I used some different Polaris BIOS and got one that worked. For those of you using a Polaris 20 GPU - The Sapphire Nitro 580 4gb (2017.11.17) worked for my Pulse 570x.