HP ProLiant ML350p - Page 52

Hardware options installation 52
DIMM type DIMM rank 1 DIMM
per
channel
— 2 DIMMs per
channel
— 3 DIMMs per
channel
—
— — 1.35V 1.5V 1.35V 1.5V 1.35V 1.5V
RDIMM
Single-rank (4GB) 1333 1600 1333 1600 1066* 1066
RDIMM
Single-rank (8GB) 1333 1600 1333 1600 1066* 1066
RDIMM
Dual-rank (8GB) 1333 1600 1333 1600 1066* 1066
RDIMM
Dual-rank (16GB) 1333 1600 1333 1600 1066* 1066
LRDIMM
Quad-rank
(32GB)
1333** 1333 1333** 1333 1066 1066
UDIMM
Single-rank (2GB) 1333 1600 1333† 1600 — —
UDIMM
Dual-rank (4GB) 1333 1600 1333† 1600 — —
UDIMM
Dual-rank (8GB) 1333 1600 1333† 1600 — —
* 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.
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.
Memory subsystem
channel
Population order Slot number (Processor
2)
Slot number (Processor
1)
1
A
E
I
12
11
10
1
2
3
2
B
F
J
9
8
7
4
5
6
3
C
G
K
1
2
3
12
11
10