Removal and replacement procedures 43
Memory
Each system board has twenty-four DIMM slots that support up to 192 GB maximum system memory
(8 GB in each of the twenty-four DIMM slots).
You must adhere to the following guidelines when adding or replacing memory modules:
• For 2P system, both physical processors must be of the same type and speed.
• Use DDR3 RDIMM/UDIMM.
• Support single-rank, dual-rank, and quad-rank DIMM.
Table 18
DIMM Population
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).
