The HD 5000 series was first to deliver DirectX 11 support, which is why we didn't go back further than this generation.
ຊຸດ HD 5000 ການສະ ຫນັບ ສະ ຫນູນ DirectX 11 ຄັ້ງ ທໍາ ອິດ, ສະນັ້ນພວກເຮົາບໍ່ໄດ້ກ້າວ ຫນ້າ ໄປກວ່າລຸ້ນຄົນນີ້.