Display Mode
Horizontal
Frequency
(kHz)
Vertical Fre-
quency (Hz)
Pixel Clock
(MHz)
Sync Polarity
(H/V)
IBM, 640 x 480
31.469
59.940
25.175
-/-
IBM, 720 x 400
31.469
70.087
28.322
-/+
MAC, 640 x 480
35.000
66.667
30.240
-/-
MAC, 832 x 624
49.726
74.551
57.284
-/-
MAC, 1152 x 870
68.681
75.062
100.000
-/-
VESA, 640 x 480
37.861
72.809
31.500
-/-
VESA, 640 x 480
37.500
75.000
31.500
-/-
VESA, 800 x 600
35.156
56.250
36.000
+/+
VESA, 800 x 600
37.879
60.317
40.000
+/+
VESA, 800 x 600
48.077
72.188
50.000
+/+
VESA, 800 x 600
46.875
75.000
49.500
+/+
VESA, 848 x 480
31.020
60.000
33.750
+/+
VESA, 1024 x 768
48.363
60.004
65.000
-/-
VESA, 1024 x 768
56.476
70.069
75.000
-/-
VESA, 1024 x 768
60.023
75.029
78.750
+/+
VESA, 1152 x 864
67.500
75.000
108.000
+/+
VESA, 1280 x 768
47.776
59.870
79.500
-/+
VESA, 1280 x 960
60.000
60.000
108.000
+/+
VESA, 1280 x 1024
63.981
60.020
108.000
+/+
VESA, 1280 x 1024
79.976
75.025
135.000
+/+
VESA, 1360 x 768
47.712
60.015
85.500
+/+
VESA, 1366 x 768
47.712
59.790
85.500
+/+
VESA, 1920 x 1080
66.587
59.934
138.500
+/-
VESA, 1920 x 1080
67.500
60.000
148.500
+/+
Horizontal Frequency
The time to scan one line connecting the right edge
to the left edge of the screen horizontally is called the
Horizontal Cycle and the inverse number of the Hor-
izontal Cycle is called the Horizontal Frequency.
Unit: kHz
Vertical Frequency
Like a fluorescent lamp, the screen has to repeat the
same image many times per second to display an
image to the user. The frequency of this repetition is
called the Vertical Frequency or Refresh Rate. Unit:
Hz
Specifications
