Silicon Graphics Origin 350, User Manual

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186 007-4566-001
6: Installing and Removing Customer-replaceable Units
Memory
Memory is contained on cards that are referred to as DIMMs (dual inline memory
modules). Each Origin 350 server system base compute module, system expansion
compute module, and MPX module can contain two, four, six, or eight DIMMs installed
on eight DIMM slots located on the module.
These eight DIMM slots are organized into a group of even-numbered slots 0, 2, 4, and 6,
and a group of odd-numbered slots 1, 3, 5, and 7, as shown in Figure 6-24 on page 188.
DIMMs are installed one per DIMM slot, and two at a time, so that the two DIMMs
installed provide local memory for the same pair of banks. For example, if you install a
DIMM in slot 0, you must install a DIMM in slot 1. (This adds memory to bank pairs 0
and 1). Table 6-2 lists the DIMM slots and the corresponding bank pairs to which local
memory is provided when DIMMs are installed.
Table 6-2 DIMMs and Bank Pairs
DIMM in Slot
Number Provides Local Memory for
Bank Pair Numbers
0 a
a. The first two DIMMs must be installed in DIMM slot 0
and DIMM slot 1.
0 and 1
1 0 and 1
2 2 and 3
3 2 and 3
4 4 and 5
5 4 and 5
6 6 and 7
7 6 and 7