User`s guide

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2: System Overview and Options
• XG2N graphics module. All systems contain at least one graphics module that has
the following components:
– A node board with zero or two Intel Itanium 2 processors (each processor has
integrated L1, L2, and L3 caches), between 0 GB and 24 GB of local memory,
and a SHUB ASIC (the crossbar between the processors, local memory, the
network interface, and the I/O interface).
– Two graphics pipes
• CPU Expansion module. Like the base compute module, the CPU module contains
a node board and local memory. This module is different from the base compute
module, however, in the following ways:
– It has zero, one, or two CPUs (the base compute module must have two CPUs)
– It does not contain PCI/PCI-X slots, hard drives, or a removable media device.
• CMPX module. Like the base compute module, the CMPX module contains a node
board and local memory. This module is different from the base compute module,
however, in the following ways:
– It has zero, one, or two CPUs (the base compute module must have two CPUs)
– It does not contain an IO10 PCI card, hard drives, or a removable media device.
• Router module. The router module is an eight-port optional router that functions as
a high-speed switch to route network packets between modules through the
NUMAlink interconnect fabric.
When the system consists of a base compute module and XG2N graphics module only, it
may contain a maximum of 4 processors and a maximum of 48 GB of memory. To increase
the number of graphics pipes, processors, and/or memory in the system, the base
compute module can connect to additional XG2N, CPU expansion and/or CMPX
modules via direct NUMAlink or through router modules.