I found the information, at section 3.4 of the manual https://dlcdnets.asus.com/pub/ASUS/LCD%20Monitors/PB287/PB287Q_English.pdf where VESA / IBM Modes Support Timing (DP/HDMI) reaches 4k but CEA-861 Formats Supported Timing (HDMI/MHL) only reach 1920
I found the information, at section 3.4 of the manual https:/ /dlcdnets. asus.com/ pub/ASUS/ LCD%20Monitors/ PB287/PB287Q_ English. pdf where VESA / IBM Modes Support Timing (DP/HDMI) reaches 4k but CEA-861 Formats Supported Timing (HDMI/MHL) only reach 1920