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Display Mode Horizontal
Frequency
(kHz)
Vertical Fre-
quency (Hz)
Pixel Clock
(MHz)
Sync Polarity
(H/V)
IBM, 640 x 350 31.469 70.086 25.175 +/-
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 -/-
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, 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, 1360 x 768 47.712 60.015 85.500 +/+
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 Horizontal 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
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