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Description 37
Video Controller
The S845WD1-E server board provides an ATI Rage XL PCI graphics accelerator, along with
2 MB of video SDRAM and support circuitry for an embedded SVGA video subsystem. The ATI
Rage XL chip contains a SVGA video controller, clock generator, 2D and 3D engine, and
RAMDAC in a 272-pin PBGA. One 2Mx32 SDRAM chip provides 2 MB of video memory.
The SVGA subsystem supports a variety of modes, up to 1600 x 1200 resolution in 8/16/24/32 bpp
modes under 2D, and up to 1024 x 768 resolution in 8/16/24/32 bpp modes under 3D. It also
supports both CRT and LCD monitors up to 100 Hz vertical refresh rate.
The S845WD1-E server board provides a standard 15-pin VGA connector and supports disabling of
the on-board video through the BIOS Setup menu or when a plug-in video card is installed in the
AGP slot or any of the PCI slots.
Video Modes
The Rage XL chip supports all standard IBM VGA modes. The following table shows the 2D/3D
modes supported for both CRT and LCD. The table specifies the minimum memory requirement
for various display resolution, refresh rates, and color depths.
Table 11. Video Modes
S845WD1-E 2D Video Mode Support
2D Mode
Refresh Rate (Hz)
8 bpp 16 bpp 24 bpp 32 bpp
640x480 60, 72, 75, 90, 100 Supported Supported Supported Supported
800x600 60, 70, 75, 90, 100 Supported Supported Supported Supported
1024x768 60, 72, 75, 90, 100 Supported Supported Supported Supported
1280x1024 43, 60 Supported Supported Supported Supported
1280x1024 70, 72 Supported – Supported Supported
1600x1200 60, 66 Supported Supported Supported Supported
1600x1200 76, 85 Supported Supported Supported –
3D Mode Refresh Rate (Hz) S845WD1-E 3D Video Mode Support with Z Buffer Enabled
640x480 60,72,75,90,100 Supported Supported Supported Supported
800x600 60,70,75,90,100 Supported Supported Supported Supported
1024x768 60,72,75,90,100 Supported Supported Supported Supported
1280x1024 43,60,70,72 Supported Supported – –
1600x1200 60,66,76,85 Supported – – –