At one time there were many manufacturers of graphics accelerators, including: 3dfx; ATI; Hercules; Trident; Nvidia; Radius; S3 Graphics; SiS and Silicon Graphics.
The G364 framebuffer was a line of graphics adapters using the SGS Thomson INMOS G364 chipset, produced by INMOS (known for their transputer and eventually acquired by SGS Thomson and incorporated into STMicroelectronics) in the early 1990s.
For use as a graphics workstation, the Indigo was equipped with a two-dimensional framebuffer or, for use as a 3d-graphics workstation, with the Elan graphics subsystem including one to four Geometry Engines (GEs).