MSI Twin Turbo-128M8 Manual - Página 5

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MSI Twin Turbo-128M8 Manual
Introduction

About True Color

True Color is so called because 24 bits (binary digits) of
information are used to define each pixel. The 24-bits are divided
as eight bits for the red channel, eight bits for the green, and eight
bits for the blue. The total number of colors that can be defined by
8
8
8
a 24-bit diplay board is 2
* 2
* 2
, which equals 16.7 million
colors. While you'll never be able to see all 16.7 million colors
displayed at once, you will appreciate the smooth, continuous
transitions in a shaded object.
The preferred display mode for QuickTime video playback is 16-
bits per pixel. Special YUV-RGB hardware on the Twin Turbo-
128M and M2 will be used to accelerate software MPEG movie
playback in future software releases.

About Acceleration

The Twin Turbo-128 processes 128-bits of graphics data every
two clock cycles. Graphics performance is inversely proportional
to the amount of color used to define each pixel. When running
the Twin Turbo-128 in 256 color mode, 16 pixels are processed
in two clock cycles. In thousands of colors mode, 8 pixels are
processed in two cycles, and in millions of color mode, 4 pixels
are processed in two cycles. Maximum graphics performance is
achieved by using the lowest possible color mode for each
application. A word processing application would operate best in
256 color mode, while a Photo-Retouching program would
operate best in millions of color mode.
Unlike DRAM based graphics accelerator cards, screen resolution
and refresh rate have little effect on graphics acceleration
performance on the Twin Turbo-128. A typical DRAM based
graphics card might only be able to display 800 x 600 pixels at
16.7 million color mode, and have degraded graphics
performance.