ViewSonic M2 User Manual page 88

Resolution
640 x 480 @ 67Hz
832 x 624 @ 75Hz
1024 x 768 @ 75Hz
1152 x 870 @ 75Hz
Refresh Rate (Hz)
66.667
74.546
75.02
75.06
Horizontal
Frequency (KHz)
35
49.722
60.241
68.68
88 88
Dot Clock
Frequency (MHz)
30.24
57.28
80
100