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Two green DDR5 RDIMM modules, no heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM server RAM

SKU CH-G07R-NEMRJ

256 GB dual-rank DDR5 RDIMM kit running at 4800 MT/s with ECC and CL40 latency for Dell PowerEdge R760 servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256 GB total capacity with two 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • CL40 latency at 1.1 V operating voltage
  • ECC registered 4Rx4 design for data integrity
  • 288-pin RDIMM form factor fits Dell PowerEdge R760

Capacity & Use Case

This 256 GB kit contains two 128 GB DDR5 RDIMMs built for Dell PowerEdge R760 rack servers. Registered ECC operation and a 4Rx4 organisation suit workloads that demand data integrity and large memory footprints such as virtualization, databases or high-performance computing.

Compatibility Check

Verify that your motherboard accepts 288-pin DDR5 registered DIMMs running at 4800 MT/s with CL40 timing at 1.1 V. Confirm the platform supports 4Rx4 modules and that the BIOS is current enough to initialise the full 256 GB capacity. Check the server manual for approved population rules and maximum supported rank per channel.

Build & Daily Implications

Modules ship without heat spreaders, relying on server chassis airflow for cooling; ensure your rack enclosure provides adequate front-to-back flow. Registered buffering adds a clock cycle of latency but reduces electrical load on the memory controller, helping stability in fully populated configurations. The 288-pin connector is keyed for DDR5 only, preventing accidental insertion into older slots.

How it compares

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

Price $7,623.99
Pricier than about 91% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $29.78 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 numberMR38400-744K2
Total capacity256 GB (2 × 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 kit include any mounting hardware or cooling accessories, or must they be purchased separately?

The kit supplies two 128 GB DDR5 RDIMM modules only; no heat spreaders, brackets or cables are included, and registered DIMMs do not require additional mounting hardware.

When would I choose the 256 GB 4Rx4 kit over a lower-capacity alternative?

Choose this 256 GB kit when the workload demands maximum registered ECC capacity per channel and the platform supports 4Rx4 modules at DDR5 4800 CL40.

What does the DDR5 4800 CL40 rating deliver in a Dell PowerEdge R760?

In a Dell PowerEdge R760 the modules run at 4800 MT/s with CL40 latency at 1.1 V, providing registered ECC throughput matched to the server's memory controller.

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