Sgi Origin 300 Base Modules - Silicon Graphics Origin 300 User Manual

1: Introduction

SGI Origin 300 Base Modules

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The SGI Origin 300 system with NUMAlink module consists of two to eight Origin 300
base modules that provide the compute functionality for the system. These base
modules, or servers, communicate with each other via the NUMAlink 3 interconnect.
Each base module consists of:
• Two or four 64-bit MIPS RISC processors
• 2 MB of secondary cache per processor
• 512 MB to 4 GB of memory
• One or two sled-mounted Ultra3 SCSI disk drives
• Zero to two PCI cards
Note: A base module is not limited to two disk drives or two PCI slots. The base module
can connect to external devices that expand the I/O and storage capabilities. Information
about these devices is provided in "Optional System Components" on page 16.
Each base module also contains an L1 controller that provides the following services:
• Controls and sequences power
• Controls and monitors the environment
• Initiates a reset
• Stores identification and configuration information
Figure 1-7 shows the front and rear views of an SGI Origin 300 base module.
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