Memory Size 8 GB
Memory Type GDDR5
Memory Bus 256 bit
Card Bus PCI-E 3.0 x 16
Output Dual-link DVI-D *1 
HDMI-2.0b*1 (Max Resolution: 4096x2160 @60 Hz)
Display Port-1.4 *3 (Max Resolution: 7680x4320 @60 Hz)

Más info:
https://www.gigabyte.com/Graphics-Card/GV-N1070G1-GAMING-8GD-rev-10#sp