Silicon Graphics Origin 350 User Manual page 99

Functional Architecture
The MPX and PCI expansion modules are peer-attached devices; they connect to the
compute module via the NUMAlink connector. If the system has a NUMAlink module,
the MPX and PCI expansion modules connect to the compute modules via the
NUMAlink module (see Figure 2-5).
For more information about the MPX module, see "MPX Module" on page 86. For more
information about the PCI expansion module, see "PCI Expansion Devices" on page 87.
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