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• Single- and dual-rank PC3-10600 (DDR-1333) RDIMMs operating at up to 1333 MT/s at 1.35V
• Single- and dual-rank PC3-12800 (DDR-1600) RDIMMs operating at up to 1600 MT/s at 1.5V
• Quad-rank PC3L-10600 (DDR3-1333) LRDIMMs, operating at up to 1333 MT/s at 1.35V
Speed, voltage, and capacity
DIMM type DIMM rank DIMM capacity Native speed (MT/s) Voltage
RDIMM
Single-rank 4 GB 1333 LV
RDIMM
Single-rank 4 GB 1600 STD
RDIMM
Dual-rank 8 GB 1333 LV
RDIMM
Single-rank 8 GB 1600 STD
RDIMM
Dual-rank 8 GB 1600 STD
RDIMM
Dual-rank 16 GB 1333 LV
LRDIMM
Quad-rank 32 GB 1333 LV
Depending on the processor model, the number of DIMMs installed, and whether LRDIMMs or RDIMMs are
installed, the memory clock speed can be reduced to 1333 or 1066 MT/s.
Populated DIMM speed (MT/s)
DIMM type DIMM rank 1 DIMM per channel 2 DIMMs per channel 3 DIMMs per channel
RDIMM
Single-rank (4 GB) 1333 1333 1066
RDIMM
Single-rank (4 GB) 1600 1600 1333†
RDIMM
Dual-rank (8 GB) 1333 1333 1066*
RDIMM
Single-rank (8 GB) 1600 1600 1333†
RDIMM
Dual-rank (8 GB) 1600 1600 1333†
RDIMM
Dual-rank (16 GB) 1333 1333 1066*
RDIMM
Dual-rank (16 GB) 1600 1600 1333†
LRDIMM
Quad-rank (32
GB)
1333** 1333** 1066
* 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
memory supports 1.5V only.
† Supported with the BIOS RBSU setting
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.