Servicing CRUs That Require Server Power-Off 67
DIMM Population Rules
The DIMM population rules for the server are as follows:
■ In dual-processor systems, all DIMM sockets can have either a DIMM or DIMM
filler panel installed.
Note – In dual-processor systems, DIMM filler panels are not required in sockets
that do not have DIMMs installed.
■ In single-processor systems, all DIMM sockets associated with processor 0 (P0)
socket can have either a DIMM or DIMM filler panel installed. DIMM sockets
associated with processor 1 (P1) socket must remain empty, that is, neither DIMMs
nor DIMM filler panel should be installed.
Note – In single-processor systems, DIMM filler panels are not required in sockets
that do not have DIMMs installed.
■ A single DIMM configuration is supported.
■ Do not populate DIMM sockets next to an empty processor socket. Each processor
contains a separate memory controller.
TABLE: DIMM Population Order for Dual-Processor Systems
Population
Order Figure Callouts
DIMM Sockets for
Processor 0 (P0) Figure Callouts
DIMM Sockets for
Processor 1 (P1)
Fill the blue sockets first
First 1 Fill D0 first 2 Then D0
Second 3 Fill D2 first 4 Then D2
Third 5 Fill D5 first 6 Then D5
Fourth 7 Fill D7 first 8 Then D7
Then fill the white sockets
Fifth 9 Fill D1 first 10 Then D1
Sixth 11 Fill D3 first 12 Then D3
Seventh 13 Fill D4 first 14 Then D4
Eighth 15 Fill D6 first 16 Then D6
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