HP ProLiant DL388e Gen8 Server - Manual (Page 59)

Hardware options installation 59
• Quad-rank PC3L-10600 (DDR3L-1333) LRDIMMs operating at up to 1333 MT/s
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 4 GB, 8 GB 1600 MT/s STD
RDIMM Single 4 GB, 8 GB 1600 MT/s LV
RDIMM Dual 8 GB,16 GB 1600 MT/s LV
LRDIMM Quad 32 GB 1333 MT/s LV
UDIMM
Single 2 GB 1600 MT/s LV
UDIMM Single 2 GB 1600 MT/s STD
UDIMM Dual 4 GB, 8 GB 1600 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.