Intel HD Graphics 530, Intel HD Graphics P530, or Intel Iris ™ Pro Graphics P580 in processor and NVIDIA Quadro® M600M (2GB memory), M3000M (4GB memory), M4000M (4GB memory), or M5000M (8GB memory); supports external digital monitor via HDMI, Mini DisplayPort, or Thunderbolt ™; supports fi ve independent displays; Max resolution: 3840×2160@60Hz (DisplayPort via Mini DisplayPort cable); 3840×2160@60Hz (Thunderbolt); 3840×2160@30Hz (HDMI)