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The following is an overview of the SGI320 specifications. Some information has been omitted for clarity. Where appropriate, information has been updated from the original specifications released by SGI (notably CPU section)

CPU 100Mhz Front Side Bus (FSB)
Single Configuration – 1.4Ghz Celeron (Tualatin)
Dual Configuration – 2 x 1Ghz P3
RAM 128MB – 1GB 100 Mhz ECC synchronous dynamic RAM
256-bit memory bus provides 3.2GB/sec bandwidth
Cobalt Chipset
Rasterization of point, line, triangle and rectangle primitives
Rasterization setup, attribute interpolation setup and anti-aliased line setup from primitive vertices and vertex attributes
Front and back face culling
Per-vertex lighting computation for up to four lights
Connected line and triangle mesh interface
Window clipping support through screen masks and clip IDs
Scissored rendering, line and polygon stippling, Gouraud shading
Texture mapping with nearest, bilinear and trilinear mip-map filtering
Anti-aliased lines
Fogging, alpha and chroma keying, alpha blending
Dithering for 4- and 5-bit RGB components
Logical operations
Color plane mask
Specular highlights on textures
8-, 16-, 32-bit color formats and 16/16, 32/32 double buffer formats
Depth buffering for 16-bit floating point and 24-bit fixed point z values
Off-screen buffers [p-buffers], fast buffer to buffer copy, overlay buffer
Stencil buffering for 8-bit stencil values
Instrument/statistics [occlusion testing and occlusion correction]
Pixel transfers with format conversion
Approximately 80% of total system memory available for textures
Support for 4K by 4K pixel per texture
Color space conversion using 4×4 color matrix
Frame lock video synchronization
Pixel format YCrCb 4:2:2, 4:4:4, YCrCbA 4:4:4:4
16-bit or 32-bit, double buffered
16-bit or 24-bit Z buffer
8-bit overlay, 8-bit stencil
RESOLUTIONS Always 16.7M colours (24-bit double buffered)
640 x 480 @ 60 Hz
800 x 600 @ 120Hz
1024 x 768 @ 120 Hz
1280 x 1024 @ 85 Hz
1600 x 1200 @ 75 Hz
1920 x 1080 @ 72 Hz
1920 x 1200 @ 66 Hz
1600 x 1024 @ 60 Hz (SGI 1600SW digital flat panel display)
485W input power supply switch AC, soft-power control input
One front-accessible bay with standard, third-height, floppy drive preinstalled
One front-accessible bay, 3.5″ x 1.0″ height for additional accessory
One front-accessible bay, 5.25″ CD drive preinstalled
Two internal bays, 3.5″ x 1.0″ for hard disks (one preinstalled, one available)
Two full-length PCI-64 slots, one half-height PCI-32 slot, on two PCI buses
16-bit, 44.1 Khz stereo input and output subsystem (RCA)
Microphone and stereo speaker minijacks
Yamaha S-YXG50 software synthesizer
System bandwidth support for 2 streams of uncompressed video
RCA and S-Video input / output (PAL / NTSC)
IEEE 1394 Firewire for connecting digital cameras and other consumer
INTEGRATED I/O One RJ-45 10/100Base-T Fast Ethernet Controller
One 25-pin parallel port, one 9-pin serial port
Audio ports [line-in, line-out, microphone-in, speaker-out]
Two USB connectors for keyboard / mouse (NT) and other devices (2000)

The official SGI320 Owner’s Guide can be downloaded by following this link:

SGI320 Owner’s Guide

The software installation guide can be found at the following link:

Software Installation Guide

Download the original firmware documentation (PROM) using the following link:

SGI320 Firmware

To view the SGI320 original datasheet as released by SGI then click on the following link:

SGI320 Datatsheet

If you would like more information on the SGI320’s graphics subsystem then refer to SGI’s original White Paper:

SGI320 Graphics Subsystem

For a detailed document outlining the capabilities of the Integrated Visual Computing Architecture download the following document:

Integrated Visual Computing

For the SGI320 Product Guide download the following document:

SGI320 Product Guide



  1. ben says:

    nice site, way better than official..any ideas how much a complete system including the screen would fetch nowadays? i have a system that needs to go.

    • miltonadamou says:

      Hi Ben,

      Thanks for your comments. I guess whatever someone is willing to pay for it 😉 I’d imagine that a system with 1 Gig of RAM, dual P3s and the 1600sw display could fetch $300-600, though I have seen them go for much less! Or you could wait another ten years when it becomes a ‘vintage’ system and probably sell it for well over $1000! cheers.

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