User`s guide

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2: System Overview and Options
CPU Expansion Module
The CPU expansion module is a 2U AC-powered device that consists of the following:
• Zero, one, or two Intel Itanium 2 processors (each with integrated L1, L2, and L3
caches)
• Between 2 GB and 24 GB of local DIMM memory (4, 8, or 12 DIMMs)
• One 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 2-4 shows the front and rear views of a CPU expansion module.