Game development company Wargaming™ has done the impossible, they have traced rays in a game at 60FPS with out using DXR or RT cores. Wargaming™ achieves this using their home brewed game engine. The "Encore" engine allows the processor to utilize Intel's Embree technology. This allows for real time ray tracing on DX11. So yes you can ray trace on AMD cards.
Information from : https://worldoftanks.com/en/news/general-news/ray-tracing/