27 " , 2560 x 1440 pixels , Wide Quad HD , 16:9 , LCD , Fast IPS , 1 ms , Flat , Contrast 1300:1 , Maximum refresh rate 255 Hz , Pixel pitch 0.233 x 0.233 mm , 1xHDMI ports quantity , 1xDisplayPorts quantity , Headphone out Yes , VESA Yes , Energy efficiency class E