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Dual Processor Memory Configurations
Size
(GB)
DIMM
Ranks
MB
DIMM1
MB
DIMM2
MB
DIMM3
MB
DIMM4
MB
DIMM5
MB
DIMM6
Riser
DIMM1
Riser
DIMM2
Riser
DIMM3
Riser
DIMM4
Riser
DIMM5
Riser
DIMM6
3 SR 1 GB 1 GB 1 GB
4 SR 1 GB 1 GB 1 GB 1 GB
6 SR 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB
8 MR 2 GB 1 GB 1 GB 2 GB 1 GB 1 GB
12 SR 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB
24 DR 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB
24 SR 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB
48 DR 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB
48 DR 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB
96 DR 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB
128 MR 16 GB 16 GB 8 GB 8 GB 8 GB 8 GB 16 GB 16 GB 8 GB 8 GB 8 GB 8 GB
192
QR
(RHEL
ONLY)
16 GB 16 GB 16 GB 16 GB 16 GB 16 GB 16 GB 16 GB 16 GB 16 GB 16 GB 16 GB
NOTE: If more than one Quad rank DIMM is installed within a channel (DIMM1 & DIMM4, DIMM2 & DIMM5, DIMM3 & DIMM6)
then the maximum DDR3 speed is reduced to 800 MHz. Spreading Quad Rank memory modules accross multiple channels is
recommended.
NOTE: DDR3 DIMMs have 240 pins, the same number as DDR2, and are the same size, but are electrically incompatible and
have a different key notch location.
Memory Subsystem
The memory subsystem consists of three DDR3 memory channels attached to each processor. All single-processor configurations
have six DIMM slots (two per channel) attached to the primary processor located on the system board. Dual-processor
configurations require an optional riser card that contains the secondary processor and the DIMMs associated with the secondary
processor. There are six DIMM slots on the riser, for a total of twelve DIMMs in the system.
DIMM slot configuration for a single processor or a second processor on the riser.
Memory Slots
There are six memory slots on the system board. The slots are numbered DIMM1 through DIMM6. DIMM1 is furthest from the
processor.