Hp Smartmemory; Memory Subsystem Architecture - HP ProLiant ML350p Gen8 User Manual

Populated DIMM speed (MT/s)
DIMM DIMM
type rank
— —
RDIMM Single-rank
(4 GB)
RDIMM Single-rank
(8 GB)
RDIMM Dual-rank
(8 GB)
RDIMM Dual-rank
(16 GB)
Quad-rank
LRDIM
(32 GB)
M
Single-rank
UDIM
(2 GB)
M
Dual-rank
UDIM
(4 GB)
M
Dual-rank
UDIM
(8 GB)
M
* RDIMMs support 1.35V 3DPC at 1066. Third-party memory supports 1.5V 3DPC at 1066.
** LRDIMMs enable 3 DIMMs per channel. HP SmartMemory supports up to 3DPC at 1066 at 1.35V. Third-party
memory supports 1.5V only.
† UDIMMs are supported at 2DPC at 1333, using HP SmartMemory only. Third-party memory supports up to 2DPC at
1066.
RDIMM, LRDIMM, and UDIMM for 3 slots per channel (1DPC and 2 DPC) supports the same data rates as 2
slot per channel.

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.

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.
2 slots per channel
1 DPC 2 DPC
1.35 V 1.50 V 1.35 V
1333, 1600, 1333,
1600 1866 1600
1333, 1600, 1333,
1600 1866 1600
1333, 1600, 1333,
1600 1866 1600
1333, 1600, 1333,
1600 1866 1600
— 1600, —
1866**
1333, 1600, 1333,
1600 1866 1600†
1333, 1600, 1333,
1600 1866 1600†
1333, 1600, 1333,
1600 1866 1600†
3 slots per channel
3 DPC
1.50 V 1.35 V 1.50 V
1600, 800, 1066,
1866 800* 1066
1600, 800, 1066,
1866 800* 1066
1600, 800, 1066,
1866 800* 1066
1600, 800, 1066.,
1866 800* 1066
1600 — 1066,
1333
1600, — —
1866
1600, — —
1866
1600, — —
1866
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