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Two green DDR5 server memory modules, bare circuit boards with gold contacts, no heat spreaders

NEMIX RAM

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

SKU CH-ZHCT-EM82M

A 256 GB DDR5 registered ECC kit of two 128 GB modules running at 4800 MT/s with CL40 latency and 1.1 V

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256GB total capacity across two 128GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • CL40 CAS latency at 1.1V operating voltage
  • ECC registered 4Rx4 design for server stability
  • 288-pin RDIMM form factor fits Dell PowerEdge R7615

256GB DDR5 ECC RDIMM kit

This 256GB kit contains two 128GB DDR5 4800 registered DIMMs built for Dell PowerEdge R7615 rack servers. Each module runs at 1.1V with CL40 latency and 4Rx4 organisation. ECC and registered buffering protect data integrity in mission-critical workloads. The kit targets IT teams upgrading compatible Dell enterprise platforms.

Tool-free DIMM installation

Modules seat in standard 288-pin DDR5 slots without special tools; the server chassis usually provides toolless access to memory risers. Installation fails when slots are populated in the wrong sequence or when mixed-rank DIMMs break the platform memory rules. Always follow the Dell service manual population table for the R7615 to avoid post errors.

Sustained-load stability

All modules undergo extended stress testing under load before shipping to verify signal integrity at 4800 MT/s. Registered buffering and on-die ECC correct single-bit errors continuously during long compute runs. The 1.1V operating voltage helps maintain thermal headroom inside dense 2U chassis during prolonged database or virtualisation workloads.

How it compares

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

Price $8,476.99
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 $33.11 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

How do I confirm the DDR5 4800 modules are running at CL40 and 1.10V after installation?

Enter the server BIOS or UEFI and verify the memory speed shows 4800 MT/s, CAS latency reads 40, and voltage reports 1.10V; the registered ECC modules will also log corrected errors in the system event log if they are active.

What comes with the 256GB kit and what must be sourced separately?

The kit includes two 128GB 288-pin DDR5 RDIMMs; no heat spreaders, cables, or tools are included, so ensure the Dell PowerEdge R7615 has free DIMM slots and follow the server manual for installation.

Which capacity version suits a Dell PowerEdge R7615 needing 256GB in two slots?

Choose the 256GB (2 x 128GB) 4Rx4 kit; it matches the R7615's registered ECC requirement, runs at DDR5 4800 CL40, and fills two DIMM slots to reach the desired total.

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