Removal and replacement procedures 65
Memory module population order
Processor memory
socket
1 2 3 4 5 6 7 8 9 10 11 12
Rank support per
memory socket
SR/DR SR/DR/
GR
SR/D
R
SR/D
R
SR/DR/
GR
SR/D
R
SR/D
R
SR/DR/G
R
SR/D
R
SR/D
R
SR/DR/
GR
SR/DR
RDIMM Population
order without QR
A 1 E C K G B J F D L H
UDIMM Population
order without QR
A E C G B F D H
Population order with
QR along with SR/DR
E A 1 G C K F B J H D L
Processor memory
bank number
1 3 2 1 3 2 1 3 2 1 3 2
NOTES:
SR = Single Rank, DR = Dual Rank, QR = Quad Rank.
Population rules must be followed for both processors.
Memory modules may be populated one at a time per processor, but populating two at a time per processor provides better performance.
Memory modules should be populated four at a time per processor for best performance.
Memory modules within a memory bank must be identical for best performance.
Quad Rank memory module can only be installed in memory sockets 2, 5, 8, and 11.
For more information on memory configurations, see the server user guide located on the Documentation CD or the HP Support website
(http://www.hp.com/support).
Figure 45 DIMM Slots
NOTE: Before installing the memory, remove the air baffle first. For a detailed procedure, see
the ”Processor” section in this chapter.
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