Display Mode
Horizontal
Frequency
(kHz)
Vertical
Frequency
(Hz)
Pixel Clock
(MHz)
Sync Polarity
(H/V)
IBM, 720 x 400 31.469 70.087 28.322 -/+
VESA, 640 x 480 43.269 85.008 36.000 -/-
VESA, 800 x 600 53.674 85.061 56.250 +/+
VESA, 1024 x 768 68.677 84.997 94.500 +/+
VESA, 1280 x 1024 91.146 85.024 157.50 +/+
VESA, 1600 x 1200 106.250 85.000 229.50 +/+
VESA, 1920 x 1440 112.500 75.000 297.00 -/+
VESA(CVT),
2048 x 1536
120.384 75.000 340.50 -/+
Horizontal Frequency
The time to scan one line connecting the right edge to the left edge of
the screen horizontally is called Horizontal Cycle and the inverse
number of the Horizontal Cycle is called 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 Vertical Frequency or Refresh
Rate. Unit: Hz
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