Specifications graphics engine rx 570 video memory 4gb gddr5 stream processor 2048 units boost clock 1250mhz memory clock 1750mhz 70gbps memory interface 256bit bus standard pcie 30 display connectors dl dvi dhdmidp x3 form factor atx cooler 2 slot fan sink power connector one 8 pin pci express power connector crossfire support yes software crossfirenbsp