Sapphire rX-580 - Pulse edition - 4Gb Oc edition with aluminum backplate - with fuse protection + Fan iC control + Black Diamond Choke 4 + dual 95mm fan with double-ball bearing + black polymer cap + nitro quick connect + FRTC (frame rate target control) - support liquidVR + XConnect ( external GPU solution for NB ) + eyefinity + Freesync technology + XDMA CrossFire ( no external connectors required ) + HDR - 14nm , 4Gb 256bit GDDR5 , 32RoPs , 256Gb/sec memory transfer ; 6175 GigaFLoPs,  193GT/s texture fill rate , 2304 stream processors , 144texture unit , core clock : 1366mhz ; memory : 7000mhz , DVi-D+ 2x HDMi+ 2x DisplayPort 1.4 ( upto 6x displays via displayport MST hub ) - require 8pin power connector