Smartmemory; Memory Subsystem Architecture - HP Synergy 480 Gen9 User Manual

• RDIMMs offer address parity protection.
• LRDIMMs support higher densities than single- and dual-rank RDIMMs, and higher speeds than quad-rank
RDIMMs. This support enables you to install more high-capacity DIMMs, resulting in higher system
capacities and higher bandwidth.
All types are referred to as DIMMs when the information applies to all types. When specified as LRDIMM or
RDIMM, the information applies to that type only. All memory installed in the compute module must be the
same type.
The compute module supports the following DIMM speeds:
• Single- and dual-rank PC4-2400 (DDR4-2400) RDIMMs operating at up to 2400 MT/s
• Dual- and quad-rank PC4-2400 (DDR4-2400) LRDIMMs operating at up to 2400 MT/s
Speed and capacity
DIMM type
RDIMM
RDIMM
RDIMM
RDIMM
LRDIMM
LRDIMM
LRDIMM
Depending on the processor model, the number of DIMMs installed, and whether LRDIMMs or RDIMMs are
installed, the memory clock speed can reduce to 1600 MT/s.
Populated DIMM speed (MT/s)
DIMM type
RDIMM
RDIMM
RDIMM
RDIMM
LRDIMM
LRDIMM
LRDIMM

SmartMemory

SmartMemory authenticates and unlocks certain features available only on Qualified memory and verifies
whether installed memory has passed Hewlett Packard Enterprise qualification and test processes. Qualified
memory is performance-tuned for ProLiant and BladeSystem servers and compute module, and provides
future enhanced support through Active Health and manageability software.

Memory subsystem architecture

The memory subsystem in this compute module is divided into channels. Each processor supports four
channels, and each channel supports three DIMM slots.
DIMM rank
Single
Single
Dual
Dual
Dual
Quad
Octal
DIMM rank 1 DIMM per
channel
Single (8 GB) 2400
Single (16 GB) 2400
Dual (16 GB) 2400
Dual (32 GB) 2400
Dual (32 GB) 2400
Quad (64 GB) 2400
Octal (128 GB) 2400
DIMM capacity (GB)
8
16
16
32
32
64
128
2 DIMMs per
channel
2133
2133
2400
2400
2400
2400
2400
Native speed (MT/s)
2400
2400
2400
2400
2400
2400
2400
3 DIMMs per
channel
1866
1866
1600
1600
2133
2133
2133
SmartMemory 33