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Green circuit board DDR5 memory module with black chips and gold edge contacts

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 4Rx4 ECC RDIMM HPE P63345-B21 memory upgrade

SKU CH-D3R6-AXBHD

A 128GB DDR5 4800 CL40 4Rx4 ECC registered DIMM built for HPE P63345-B21 servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB DDR5 4800 MHz capacity for large-scale workloads
  • CL40 latency at 1.1 V for efficient server operation
  • 4Rx4 registered ECC design protects data integrity
  • 288-pin RDIMM form factor fits HPE P63345-B21 systems
  • Built with Samsung, Micron or Hynix chips for reliability

HPE DDR5 4800 ECC RDIMM Server Memory

This 128GB registered DDR5 module operates at 4800MHz with CL40 latency and 1.1V voltage. It uses a 4Rx4 rank configuration and 288-pin form factor for HPE server compatibility. The ECC registered design targets data integrity in enterprise workloads.

DDR5 4800 Interface Practical Limits

DDR5 4800 delivers 38400 MB/s peak bandwidth per module. Registered buffering adds one clock cycle of latency versus unbuffered memory. The 1.1V operating voltage reduces power draw compared to earlier DDR generations. Mixed-speed populations will downclock to the slowest installed module.

128GB 4Rx4 Capacity Constraint

A single 128GB 4Rx4 module occupies one DIMM slot but presents four logical ranks to the memory controller. Platforms limited to eight ranks per channel can only populate two such modules per channel. Systems requiring higher densities per slot or lower rank counts for maximum channel population should evaluate alternative configurations.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $4,044.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.60 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineHPE Server/Workstation Compatible Series Memory
Model nameHPE DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K1
Total capacity128 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsHPE
In the box
Included items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Should I pick the 128 GB module or combine smaller DIMMs to reach the same capacity?

This listing is a single 128 GB stick, so one module fills one slot and delivers the full capacity.

What does the 4800 MT/s rating mean for actual throughput in my server?

The module runs at DDR5 4800, giving a peak transfer rate of PC5 38400 MB/s when the platform supports that speed.

Is the 288-pin RDIMM interface compatible with standard DDR5 server boards, and does the 4Rx4 rank limit how many I can install?

It uses the 288-pin DDR5 RDIMM form factor with 4Rx4 organisation; population limits depend on the specific HPE server memory controller.

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