A:AnswerThis is a HI Def monitor but not 4K monitor. It's aspect ratio 21:9. Ii has both HDMI a Display Port inpots. The Display Port input gives you a higher refresh rate to 100 HZ. I believe the max resolution is 50 or 60 hz at max resolution of 3440 by 1440 (Native) with HDMI. Hope this helps.