The SGI Tezro is the second most recently released (as of December 2005) series of high-end computer workstation available from SGI, and is the immediate successor to the SGI Octane line. The systems are available in both rack-mount and tower versions, and the series was released in June 2003 with a list price of $20,500. The Tezro was released alongside the SGI Onyx4 (and because of component sharing, the Onyx4 and rack-mountable Tezro share many components, including skins).
Both tower and rack-mountable systems marked the return of the original 'cube' logo to SGI machines, which was welcomed by the loyal user base.
Similar to other SGI systems, the Tezro uses a non-blocking crossbar interconnect to connect all subsystems together.
ARCS is provided as the boot firmware, similar to all contemporary SGI computer systems.
Tezro systems including either one, two or four 64-bit R16000 CPUs (in multiprocessor configurations) are available in both rack-mount and tower systems. Available MIPS R16000 CPU configurations include single, dual or quad 700MHz or 800MHz with 4MB L2 cache, and dual or quad 1GHz with 16MB L2 cache.
The Tezro ships with 512MB of DDR SDRAM as standard. 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.
The high-end Odyssey graphics adapter, V12, is the only graphics configuration available. Dual head (twin V12 cards) are not possible on the 1 GHz CPU models due to the height of the CPU heatsinks.
Tower systems ship with analogue audio output as standard, while 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 depend upon the number of CPUs installed in the system:
- 7 133/100MHz slots in two- or four-CPU tower systems
- 3 133/100MHz slots in single-CPU tower systems
- 6 100MHz slots and one 66MHz slot in 4U rackmountable systems
- 2 100MHz slots and one 66MHz slot in 2U rackmountable systems.
All PCI slots in each Tezro model are 3.3V card slots.
A single U160 SCSI connector is available for attaching external peripherals, as is an optional FireWire card.
The only operating system produced for the Tezro is SGI's IRIX.