I now have confirmation of the P2815Q’s full specs, and have listed them below. Unfortunately, it tops out at 30Hz 3840 x 2160 and 60Hz for 1920 x 1080. This should prove a deal breaker for gamers, but the monitor still has a solid feature set for the asking price.
Panel tech: Anti-glare TN (not IPS which was previously rumored)
Connections: DisplayPort (v 1.21)/Mini-DisplayPort, HDMI 1.4 (MHL 2.0), DispayPort out (MST), 1 USB upstream, 4 x USB 3.02 downstream (including 1 USB charging port with BC1.2 compliance devices on back)
Color Depth: 1.073 billion colors
Viewing angle: 170 degrees
Response time: 5ms
Brightness: 300 cd/m2
Power Consumption: 75W
Πηγή: http://www.forbes.com/sites/jasonevangelho/2014/01/07/dell-wasnt-joking-about-that-28-inch-sub-1000-4k-monitor-its-only-699/