I can run dx11 in rF2 fairly well with this card, even with the 1440p 144hz monitor i"m using now. The card is targeted at DX12, supposedly. I ran the benchmark test suggested from a couple of posts here and found the test did not report any dx11 results. I'm curious if DX11 is only partially supported by the RX 480-8.
All DX versions are backwards compatible, so a card that works with DX12 works 100% with DX11, DX10, DX9, DX8, DX7, etc.
