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DIMM type DIMM rank
Quad-rank (32
LRDIMM
GB)
Quad-rank (32
LRDIMM
GB)
1
Supported with the BIOS RBSU setting
2
IVB memory
3
RDIMM supports 1.35V 3DPC at 1066. Third-party memory supports 1.5V 3DPC at 1066 MT/s.
LRDIMM enables 3 DIMMs per channel. HP SmartMemory supports up to 3DPC at 1066 MT/s at 1.35V. Third-party
4
memory supports 1.5V only.
HP SmartMemory
HP SmartMemory, introduced for Gen8 servers, authenticates and unlocks certain features available only on
HP Qualified memory and verifies whether installed memory has passed HP qualification and test processes.
Qualified memory is performance-tuned for HP ProLiant and BladeSystem servers and provides future
enhanced support through HP Active Health and manageability software.
Certain performance features are unique to HP SmartMemory. HP SmartMemory 1.35V DDR3-1333
Registered memory is engineered to achieve the same performance level as 1.5V memory. For example,
while the industry supports DDR3-1333 RDIMM at 1.5V, this Gen8 server supports up to 3 DDR3-1333
RDIMMs per channel at 1066 MT/s running at 1.35V. This equates to up to 20% less power at the DIMM
level with no performance penalty. In addition, the industry supports DDR3-1600 RDIMMs at 3 DIMMs per
channel at 1066 MT/s. HP SmartMemory supports 3 RDIMMs per channel at 1333 MT/s, or 25% greater
bandwidth with an RBSU setting.
Memory subsystem architecture
The memory subsystem in this server is divided into channels. Each processor supports four channels, and
each channel supports three DIMM slots, as shown in the following table.
Channel
1
2
3
4
For the location of the slot numbers, see "DIMM slot locations (on page 14)."
This multi-channel architecture provides enhanced performance in Advanced ECC mode. This architecture
also enables Lockstep and Online Spare Memory modes.
DIMM slots in this server are identified by number and by letter. Letters identify the population order. Slot
numbers indicate the DIMM slot ID for spare replacement.
1 DIMM per channel
1333
4
1866
Population order
A
E
I
B
F
J
C
G
K
D
H
L
2 DIMMs per channel
1333
4
1066
Slot number
12
11
10
9
8
7
1
2
3
4
5
6
3 DIMMs per channel
1066
1333
2
Hardware options installation 40
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