HP ProLiant DL388e HP ProLiant DL388e Gen8 Server User Guide - Page 58

HP SmartMemory, Supported DIMM specifications, Capacity, Native speed, Voltage

Page 58 highlights

Depending on the processor model, the number of DIMMs installed, and whether LRDIMMs, UDIMMs, or RDIMMs are installed, the memory clock speed can be reduced to 1333 or 1066 MT/s. Clock speed can also be reduced when using low-voltage DIMMs. Supported DIMM specifications Type RDIMM RDIMM RDIMM RDIMM LRDIMM UDIMM UDIMM UDIMM UDIMM Rank Single Dual Single Dual Quad Single Single Dual Dual Capacity 4 GB, 8 GB 8 GB,16 GB 4 GB 8 GB, 16 GB 32 GB 2 GB 2 GB 4 GB, 8 GB 4 GB Native speed 1600 MT/s 1600 MT/s 1333 MT/s 1333 MT/s 1333 MT/s 1333 MT/s 1600 MT/s 1333 MT/s 1600 MT/s Voltage STD STD LV LV LV LV STD LV STD Populated DIMM speed (MT/s) Type Rank 1 DIMM per channel 2 DIMMs per channel RDIMM RDIMM RDIMM LRDIMM UDIMM Single (8 GB) Dual (8 GB) Dual (16 GB) Quad (32 GB) Dual (8 GB) 1600 MT/s 1600 MT/s 1600 MT/s 1333 MT/s** 1600 MT/s 1600 MT/s 1600 MT/s 1600 MT/s 1333 MT/s** 1600 MT/s ** LRDIMM enables 2 DPC. HP SmartMemory supports up to 2 DPC at 1333 MT/s at 1.35 V. Third-party memory supports only 1.5 V. 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 with 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 DDR3-1333 RDIMM up to 3 DIMMs 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 UDIMM at 2 DIMMs per channel at 1066 MT/s. HP SmartMemory supports 2 DIMMs per channel at 1333 MT/s, or 25% greater bandwidth. Hardware options installation 58

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Hardware options installation 58
Depending on the processor model, the number of DIMMs installed, and whether LRDIMMs, UDIMMs, or
RDIMMs are installed, the memory clock speed can be reduced to 1333 or 1066 MT/s. Clock speed can
also be reduced when using low-voltage DIMMs.
Supported DIMM specifications
Type
Rank
Capacity
Native speed
Voltage
RDIMM
Single
4 GB, 8 GB
1600 MT/s
STD
RDIMM
Dual
8 GB,16 GB
1600 MT/s
STD
RDIMM
Single
4 GB
1333 MT/s
LV
RDIMM
Dual
8 GB, 16 GB
1333 MT/s
LV
LRDIMM
Quad
32 GB
1333 MT/s
LV
UDIMM
Single
2 GB
1333 MT/s
LV
UDIMM
Single
2 GB
1600 MT/s
STD
UDIMM
Dual
4 GB, 8 GB
1333 MT/s
LV
UDIMM
Dual
4 GB
1600 MT/s
STD
Populated DIMM speed (MT/s)
Type
Rank
1 DIMM per channel
2 DIMMs per channel
RDIMM
Single (8 GB)
1600 MT/s
1600 MT/s
RDIMM
Dual (8 GB)
1600 MT/s
1600 MT/s
RDIMM
Dual (16 GB)
1600 MT/s
1600 MT/s
LRDIMM
Quad (32 GB)
1333 MT/s**
1333 MT/s**
UDIMM
Dual (8 GB)
1600 MT/s
1600 MT/s
** LRDIMM enables 2 DPC. HP SmartMemory supports up to 2 DPC at 1333 MT/s at 1.35 V. Third-party memory
supports only 1.5 V.
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 with 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 DDR3-1333 RDIMM up
to 3 DIMMs 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 UDIMM at 2 DIMMs per channel at
1066 MT/s. HP SmartMemory supports 2 DIMMs per channel at 1333 MT/s, or 25% greater bandwidth.