The Origin 3000 and the Onyx 3000 is a family of mid-range and high-end computers developed and manufactured by SGI.
Entry-level variants of these systems based on the same architecture but with a different hardware implementation are known as the Origin 300 and Onyx 300.
The NUMAlink 3 system interconnect uses a fat tree hypercube network topology.
The node contains two or four processors, the local and directory memory, and the Bedrock ASIC.
Near the end of its lifetime, the C-brick was updated with 800 MHz MIPS processors.
The Bedrock ASIC connects the processors, local and directory memory and the Crosstown2 interface to the NUMAlink 3 system interconnect using a crossbar.
Although each PIMM contains two microprocessors, but only has one 1.6 GB/s interface to the Bedrock ASIC, the single interface is multiplexed to enable the two processors on each PIMM to operate independently without bus contention at the cost of reduced bandwidth.
It differs from the C-brick by containing four node boards and eight-port router ASIC.
It features five hot swappable PCI-X slots, with three clocked at 33 MHz and two at 66 MHz on two separate buses, two sled-mounted 3.5-inch Fibre Channel hard drives and a proprietary CD-ROM drive.
It an updated version of the I-brick with 133 MHz PCI-X expansion slots.
The P-brick is a 4U-high enclosure that provides an additional 12 PCI-X expansion slots on six buses to the system.
Onyx 3000 refers to Origin 3000 systems that are sold with graphics hardware as standard.
The N-brick is a 2U-high enclosure that allows the C-bricks to connect to the G-bricks without using X-bricks or I-bricks, thus saving space as the other bricks are taller.