The SGI Onyx2, code name Kego, is a family of visualization systems developed and manufactured by SGI

Silicon Graphics

Silicon Graphics, Inc. was a manufacturer of high-performance computing solutions, including computer hardware and software, founded in 1981 by Jim Clark...

, introduced in 1996 to succeed the Onyx

SGI Onyx

The SGI Onyx, code named Eveready and Terminator , is a series of visualization systems designed and manufactured by SGI, introduced in 1993 and offered in two models, deskside and rackmount. The Onyx's basic system architecture is based on the SGI Challenge servers, but with the notable inclusion...

. The Onyx2's basic system architecture is based on the Origin 2000

SGI Origin 2000

The SGI Origin 2000, code named Lego, is a family of mid-range and high-end servers developed and manufactured by SGI and introduced in 1996 to succeed the SGI Challenge and POWER Challenge. At the time of introduction, these systems ran IRIX 6.4 and later, IRIX 6.5. A variant of the Origin 2000...

 servers, but with the notable inclusion of graphics hardware. In 2000, the Onyx2 was succeeded by the Onyx 3000, and it was discontinued on 27 June 2003. These systems ran either IRIX

IRIX

IRIX is a computer operating system developed by Silicon Graphics, Inc. to run natively on their 32- and 64-bit MIPS architecture workstations and servers. It was based on UNIX System V with BSD extensions. IRIX was the first operating system to include the XFS file system.The last major version...

 6.4 or 6.5.

Models

Model	# of CPUs	Memory	# of graphics pipelines	Chassis	Introduced	Discontinued
Onyx2 Deskside	1 to 4	128 MB to 8 GB	1	Deskside	?	27 June 2003
Onyx2 Single Rack	2 to 8	128 MB to 16 GB	1 or 2	Single rack	?	27 June 2003
Onyx2 Multi-Rack	4 to 128	256 MB to 256 GB	1 to 16	Multi Rack	?	27 June 2003

Microprocessor

The Onyx2 used the MIPS

MIPS architecture

MIPS is a reduced instruction set computer instruction set architecture developed by MIPS Technologies . The early MIPS architectures were 32-bit, and later versions were 64-bit...

 R10000

R10000

The R10000, code-named "T5", is a RISC microprocessor implementation of the MIPS IV instruction set architecture developed by MIPS Technologies, Inc. , then a division of Silicon Graphics, Inc. . The chief designers were Chris Rowen and Kenneth C. Yeager...

 microprocessor

Microprocessor

A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...

 clocked at 150, 175, 180 and 195 MHz, later increased to 250 MHz, courtesy of a process shrink from 0.35 to 0.25 micrometres.
Later 300 and 400mhz R12000, and 500mhz R14000 CPUs were made available.

Graphics subsystem

At the time of their introduction, the Onyx2 could be configured with the Reality, InfiniteReality

InfiniteReality

InfiniteReality refers to a 3D graphics hardware architecture and a family of graphics systems that implemented the aforementioned hardware architecture that was developed and manufactured by Silicon Graphics from 1996 to 2005...

 or InfiniteReality2 graphics subsystems. Later, the InfiniteReality2E was made available and then the InifiniteReality3, in April 2000.