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Hardware options installation 52
Memory options
The server memory subsystem supports UDIMMs only. UDIMMs represent the most basic type of memory
module and offer lower latency and (relatively) low power consumption, but are limited in capacity.
The server supports dual-rank, PC3-10600E/PC3-12800E (DDR3 ECC) DIMMs operating at 1333 MHz or
1600 MHz speed.
Memory speed depends on the type of processor and the number of DIMMs installed in the server. Installed
DIMMs can operate at either 1600 MT/s or 1333 MT/s. For more information, see the technical
specification of the installed processor.
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. 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.
DIMM identification
To determine DIMM characteristics, use the label attached to the DIMM and the following illustration and
table.
Item Description Definition
1
Size —
2
Rank 1R = Single-rank
2R = Dual-rank
3R = Three-rank
4R = Quad-rank