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SGI Maximum IMPACT
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Maximum Impact graphics are the highest tier of SGI's IMPACT graphics offered both on the SGI Indigo2 and SGI Octane workstations. They include a 27MB frame buffer and have 2 raster engines (i.e. are "2RSS" boards). On the Octane, you can upgrade a SSI/SSE graphics board to Maximum Impact (MXI/EMXI) by adding two texture RAM (TRAM) modules.
Indigo2 Maximum Impact Overview
The Indigo2 Maximum Impact included:
HQ3 Command Processor:
- Distributes graphics primitives to Geometry Engine
- GIO64 bus interface
- Pixel DMA engine
- 300,000 gates
Two GE11 Geometry/Image Engines:
- Power the graphics subsystem
- 960 MFLOPS for transforming triangles
- 960 MIOPS for processing pixels
- 600,000 gates each
- Note: The refreshed Octane 'E-series' Geometry engines were capable of 1344 MFLOPS
Two RE4 Raster Engines:
- Provide the pixel-fill capabilities
- 234 Mpixels/sec gouraud fill rate
- 300,000 gates each
Two TE Texture Engines:
- Fill, warp, and zoom image/texture data
- 295,000 gates each
One or Four MB Texture Memory:
- Interpolates image/texture data and performs MIP-mapping interpolation
- 1MB of texture memory with expandability to 4MB through optional Mezzanine card
- 60,000 gates + 8MB DRAM for each MB
Four PP1 Pixel Pipe Processors:
- Provide blending, depth and dithering
- 290,000 gates each
Live Video:
- Expansion port supports Indigo2 Mindshare Bundle, Indigo2 IMPACT Video, Indigo2 IMPACT Channel Option, or Indigo2 Presenter