I got a hold of a r7 5700 non x (oem) and most motherboard don't list this sku as a compatible model. Does anyone have one working? If so, what motherboard?
Well, yeah, they don't list it since R7 5700 is OEM chip and not intended for consumer market.
As far as which MoBo supports it, it is either of the two:
1. Any MoBo that supports R7 5700G/X will support R7 5700 as well.
2. None of the consumer MoBos support R7 5700 since it's an OEM chip.