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Sixteen bare green DDR5 RDIMM sticks in a row

NEMIX RAM

NEMIX RAM 2TB (16x128GB) DDR5 4800 ECC RDIMM server RAM

SKU CH-J98E-JW4R1

16×128 GB DDR5-4800 ECC registered RDIMM kit totalling 2 TB for Dell PowerEdge R660 servers

  • Total capacity2 TB (16 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 2TB total capacity from 16 modules of 128GB each
  • DDR5 4800 speed with PC5-38400 bandwidth for server workloads
  • ECC registered design with 4Rx4 rank for data integrity
  • 10V operating voltage reduces power draw in dense configs
  • Validated for Dell PowerEdge R660 rack server compatibility

Dell PowerEdge R660 memory kit

This 2 TB kit supplies sixteen 128 GB DDR5 RDIMMs built for Dell PowerEdge R660 rack servers. IT teams upgrading dense compute nodes use it to reach the platform's maximum supported capacity. Registered ECC operation protects data integrity in virtualisation, database and HPC workloads. The modules run at the platform-native 4800 MT/s speed with CL40 latency.

Registered ECC DDR5 at 1.1 V

Registered buffering reduces electrical load on the server memory controller, allowing all sixteen slots to be populated without signal degradation. ECC corrects single-bit errors and detects multi-bit faults, keeping critical services online. The 1.10 V operating voltage matches the DDR5 baseline, so no special power-phase tuning is required. Standard 288-pin RDIMM form factor fits the R660 DIMM sockets directly.

Sixteen matched modules in one kit

The kit delivers a single validated part number, MR38400-744K16, eliminating the need to source and qualify individual sticks. Samsung, Micron or Hynix DRAM chips are used depending on supply, but every module meets the same CL40 4800 specification. No heat spreaders are fitted, relying on the server's directed airflow for cooling. Lifetime replacement warranty covers the full kit.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $61,147.99
Pricier than about 98% of the 6,523 comparable items (median $188.99).
Total capacity 2 TB (16 × 128 GB)
Higher than about 95% of the 6,064 comparable items (median 32 GB).
Price per GB $30.57 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Series Server Memory
Model nameDell Compatible DDR5 ECC Registered RDIMM
Part numberMR38400-744K16
Total capacity2 TB (16 × 128 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
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Questions about this item

Does the 1.10V operating voltage limit sustained throughput under continuous load?

The kit runs at the standard DDR5 1.10V; voltage is not a throttle point, sustained throughput is governed by the 4800 MT/s data rate and CL40 latency.

How much heat does a full 16-module kit produce when running all day in a Dell PowerEdge R660?

Modules have no heat spreaders and draw 1.1V each; total power scales with 16 x 128GB at 4800 MT/s, so airflow must handle the combined thermal load of all registered DIMMs.

What motherboard slot count and chipset support are required to use all 16 x 128GB RDIMMs?

A DDR5 server motherboard with 16 x 288-pin RDIMM slots and a chipset that supports 4Rx4 registered ECC modules at 4800 MT/s is required.

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