SGI Tezro

From Wikipedia, the free encyclopedia
Jump to: navigation, search
SGI Tezro

The SGI Tezro is a series of high-end computer workstations sold by SGI from 2003 until 2006. Using MIPS CPUs and running IRIX, it is the immediate successor to the SGI Octane line. The systems were produced in both rack-mount and tower versions, and the series was released in June 2003 with a list price of US$20,500. The Tezro was released alongside the SGI Onyx4 and rack-mountable Tezro shares many components with it, including skins.[1] Tezro marked the return of the original cube logo to SGI machines.

It was replaced in 2008 by the SGI Virtu product line.

Technical specifications[edit]


Similar to other SGI systems, the Tezro uses a non-blocking crossbar interconnect to connect all subsystems together. Tezro is based on SGI's Origin 3000 architecture.

ARCS is provided as the boot firmware, as with other SGI computer systems of that era.


Tezro systems use one to four 64-bit MIPS R16000 microprocessors. Configurations include these: two or four 1.0 GHz R16000s with 16 MB of L2 cache; or one, two, or four 700 or 800 MHz R16000s with 4 MB of L2 cache.

Node boards from Onyx/Origin 350/3900 systems are compatible and use the same RAM. For example, a quad-R16K/700 MHz (8MB L2) board from a CX-Brick will work in a Tezro; likewise, other boards up to the same quad-1 GHz edition.[2]


The Tezro shipped with 512MB of DDR SDRAM. It can be expanded using proprietary DIMMs. The tower version can hold up to 8GB of main memory, and rack-mountable version up to 16GB of main memory.


Tezro supports the VPro V10 and V12 graphics options. Dual-head and dual-channel options were also produced, allowing a fully equipped rackmount Tezro to drive four high-resolution monitors at once.


Tower systems shipped with analog audio output as standard, and PCI cards provide audio capabilities (including 2-channel 24-bit AES and 8-channel ADAT connectors) on rack-mountable versions.


The number of available 64-bit PCI slots included in a Tezro system depends upon the number of CPUs installed in the system:

  • 7 133/100 MHz slots in two- or four-CPU tower systems
  • 3 133/100 MHz slots in single-CPU tower systems
  • 6 100 MHz slots and two 66 MHz slots in 4U rackmountable systems
  • 2 100 MHz slots and one 66 MHz slot in 2U rackmountable systems.

All PCI slots in each Tezro model are 3.3V card slots.

A single U160 SCSI connector was produced for attaching external peripherals, as was an optional FireWire card.


External links[edit]