Dimm Installation Guidelines - Sun Microsystems Sun Fire V490 Parts Installation And Removal Manual

Each CPU/Memory board must be populated with a minimum of eight identical
I
DIMMs, with at least one A group populated (A0 or A1) and at least one B group
populated (B0 or B1).
The following table summarizes the guidelines for installing DIMMs in a
CPU/Memory board.
TABLE 4-1
Population Sequence
Install first eight
DIMMs into groups A0
and B0 (so that every
other slot is occupied).
Install next four
DIMMs into group A1.
Fill last four available
slots (group B1).
For additional information about DIMMs, refer to your Sun Fire V490 Server
Administration Guide.
86 Sun Fire V490 Server Parts Installation and Removal Guide • October 2005

DIMM Installation Guidelines

Memory Interleaving Factor
Four-way interleaving if all
eight DIMMs are identical;
two-way interleaving
otherwise
Four-way interleaving
between any two groups
configured identically; two-
way interleaving in any group
that does not match the
capacities used in any other
group
Eight-way interleaving if all 16
DIMMs are identical; four-way
interleaving between any two
groups configured identically;
two-way interleaving in any
group that does not match the
capacities used in any other
group