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The O2 is Silicon Graphics's successor of the Indy workstation. It comes in several versions with R5000, RM7000, R10000 or R12000 processors.

The O2 Workstation is based around the CRIME, MACE, VICE, and GBE ASICs. CRIME ASIC is the main system ASIC which interfaces the MIPS cpu, memory system and the I/O system in the MACE ASIC. CRIME ASIC also contains the 3D gfx rendering engine which renders to main system memory -- part of which is used as the frame buffer which is DMA'ed to a video connector using the GBE ASIC. A MACE chip is used to provide legacy device support (serial, parallel, video, rtc...). VICE ASIC is used to process video streams and images stored in memory.