Asus ROG Strix XG309CM Manual page 31

Video Timing
Video Timing
Video Timing
* The modes not listed in the above tables may not be supported. For
optimal resolution, we recommend that you choose a mode listed in
the above tables.
3-14
2560 1080P
3840 2160P
3840 2160P
50 O
50 O
59.94/60 O
Chapter 3: General Instruction
O O
O O
O O