Single gpu graphics card series ati amd radeon r9 285 slot pcie pcie lanes x16 pcie version 30 chipset ati amd tonga chipset manufacturer ati amd cpu clock speed 954 mhz memory size 2 gb memory type gddr5 memory interface 256 bit memory clock speed 5 500 mhz interfaces 2x dvi display port hdmi dvi specifications dvi i dual link dvi d dual link directx support 12 opengl support 43 shader model 51 stream processing units 1 792 pr