User's Manual (1.2a)

Chapter 2: Installation
2-9
Memory Population for Optimal Performance
-For a Motherboard with One CPU (CPU1) Installed
# DIMMS CPU Channel 1 Channel 2 Channel 3 Channel 4
4 DIMMs CPU1 P1-1A P1-2A P1-3A P1-4A
8 DIMMs CPU1 P1-1A P1-1B P1-2A P1-2B P1-3A P1-3B P1-4A P1-4B
Memory Population for Optimal Performance
-For a Motherboard with Two CPUs (CPU1 & CPU2) Installed
# DIMMS CPU Channel 1 Channel 2 Channel 3 Channel 4
8 DIMMs
CPU1 P1-1A P1-2A P1-3A P1-4A
CPU2 P2-1A P2-2A P2-3A P2-4A
16 DIMMs
CPU1 P1-1A P1-1B P1-2A P1-2B P1-3A P1-3B P1-4A P1-4B
CPU2 P2-1A P2-1B P2-2A P2-2B P2-3A P2-3B P2-4A P2-4B
DIMM Module Population Confi guration
For memory to work properly, follow the tables below for memory installation:
Per Channel DIMM Populations Options
DIMM Type DIMM A DIMM B Max. MHz,
1.5V DIMMs
Max. MHz,
1.35V DIMMs
Max. GB/
Channel
Unbuffered
DIMM
SR or DR Empty
1600 MHz
1333 MHz
8 GB
SR SR
1600 MHz 8 GB
DR DR
1333 MHz 16 GB
Registered
DIMM
SR or DR Empty
1600 MHz
1333 MHz
16 GB
SR SR
1600 MHz 16 GB
DR DR
1600 MHz 32 GB
QR Empty 1333 MHz 1066 MHz 32 GB
QR QR 1066 MHz 800 MHz 64 GB
LRDIMM
QR Empty 1333 MHz 32 GB
QR QR 1333 MHz 64 GB
Note 1: Due to OS limitations, some operating systems may not show more than
4 GB of memory.
Note 2: Due to memory allocation to system devices, the amount of memory that
remains available for operational use will be reduced when 4 GB of RAM is used.
The reduction in memory availability is disproportional.