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Graphics Cards

The diagram below shows the 3Dlabs Oxygen GVX1 graphics card .

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The video memory, also known as SGRAM, is a local block of RAM for holding major data structures: Frame Buffer (double buffer), Z-Buffer and T-Buffer (Texture Buffer). The Frame Buffer holds one frame steady on the screen while the next one is being processed, while the Z-buffer stores depth information for each pixel.

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The number of colors supported is limited by the graphics device and the video memory. The resolution/color/refresh-rate combination is limited by a combination of the display driver, the graphics device, and the video memory. If the resolution/refresh-rate combination is set higher than the display can support, you risk damaging the display. The table below summarizes the 3D video resolutions and refresh rates that are supported.

Mx	L® stw	]tut p
640 x 480	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
800 x 600	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1024 x 768	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1152 x 864	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1280 x 960	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1280 x 1024	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1600 x 1200	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1920 x 1080	8-bit, 16-bit, True color	100, 85, 75, 60 Hz
1920 x 1200	8-bit, 16-bit, True color	76 Hz
2048 x 1536	8-bit, 16-bit, True color	60 Hz

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