The Onyx's basic system architecture is based on the SGI Challenge servers, but with the notable inclusion of graphics hardware.
Challenge Cup | Challenge Tour | Challenge Anneka | University Challenge | Millennium Challenge Corporation | Diamond Challenge Sculls | USA Pro Cycling Challenge | Challenge | The Great Indian Laughter Challenge | Infinite Challenge | WRU Challenge Cup | World Club Challenge | SGI Origin 2000 | Sa Re Ga Ma Pa Challenge 2005 | Real World/Road Rules Challenge: Fresh Meat | Grand Challenge Cup | Fletcher Challenge | FIRST Tech Challenge | Extra Challenge | Ultimate Poker Challenge | The Man and the Challenge | SGI Onyx2 | Rachel's Challenge | Power Challenge | Intercontinental Rally Challenge | Global Challenge | DARPA Grand Challenge | Challenge (TV channel) | Challenge for Change | Challenge Cup (UK Ice Hockey) |
Users of the R8000 were SGI, who used it in their Power Indigo2 workstation, Power Challenge server, Power ChallengeArray cluster and Power Onyx visualization system.