Not giving up on 3d yet.
Installed the 4890FIX bios AND got it working. (Tried the rivatuner thing, its jut not as stable as CCC clocking in my experience). Hopefully smart doctor will not cause stop errors in XP

(as it did in Mojave)
Not 100% certain I think the 4890FIX also removed the OCP or raises it at least.
Will figure it out and post up some more stuff tonight