Is R9 280 a dx12?
The Radeon R9 280 was a performance-segment graphics card by AMD, launched on March 4th, 2014. Built on the 28 nm process, and based on the Tahiti graphics processor, in its Tahiti PRO3 variant, the card supports DirectX 12. Radeon R9 280 is connected to the rest of the system using a PCI-Express 3.0 x16 interface.
Can I run DX11?
You will need a Graphics card that supports DX11. – If you do not see “11” or above in the “DDI Version or “Feature Levels” line, your graphic card does not support DX11 and you will be unable to play.