Getting R9 290X working in Sierra

Hiya,

I have been running a GTX 970 SC since I built my hack. This doesn't give me Metal support unfortunately. A friend has a 290x that he's let me borrow to see if I can get it working but thus far literally no luck. It recognised as an HD8xxx card 4096mb after injecting a fake ID but it seems buggy as hell!

Should I be doing something else with clover or installing a particular kext?

I need that acceleration otherwise really little point.

Thanks!