Sapphire rX-550 - Pulse edition - 4Gb - with fuse protection + black polymer cap + FRTC (frame rate target control) - support XConnect ( external GPU solution for NB ) + eyefinity + Freesync technology + XDMA CrossFire ( no external connectors required ) + HDR - 14nm , 4Gb 128bit GDDR5 , 16RoPs , 112Gb/sec memory transfer ; 1211.4 GigaFLoPs,  37.9GT/s texture fill rate , 512 stream processors , 32texture unit , core clock : 1071mhz ; memory : 6000mhz , DVi-D+ 1x HDMi+ 1x DisplayPort 1.4