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Two green DDR5 RDIMM modules in anti-static bags

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 ECC RDIMM Dell XR7620 memory upgrade

SKU CH-BXVC-TH9Q6

A 256 GB registered DDR5 kit (2 × 128 GB) running at 4800 MT/s with ECC for Dell PowerEdge XR7620 servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256GB total capacity with two 128GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects data errors
  • 1V operating voltage reduces power draw
  • Qualified for Dell PowerEdge XR7620 rack server

Dell PowerEdge XR7620 upgrade kit

This 256 GB kit provides two 128 GB DDR5 4800 registered ECC modules built for the Dell PowerEdge XR7620 rack server. Each module uses a 288-pin RDIMM form factor with a 4Rx4 organisation and operates at 1.1 V. The memory is designed for IT teams who need to expand capacity in this specific platform.

Two matched 128 GB modules

The kit ships as a matched pair so the server can populate two slots with identical 4Rx4 registered DIMMs. This arrangement lets the memory controller address the full 256 GB without mixing ranks or speeds. No heat spreaders are included, relying on the chassis airflow of the XR7620 for cooling.

DDR5 4800 registered ECC limits

Registered ECC DDR5 at 4800 MT/s adds a clock cycle of buffering and error correction that increases latency compared with unbuffered memory. The 4Rx4 density also restricts the maximum number of ranks per channel the platform can support. Systems that require higher frequencies or lower CAS latency cannot use this kit.

How it compares

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

Price $7,087.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.69 per GB
Pricier than about 77% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR5 4800 MHz ECC RDIMM Registered Server Memory
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
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsDell
In the box
Included items256 GB (2 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules need any firmware updates or thermal pad replacements over time?

No firmware updates or thermal pad replacements are required; the modules have no heat spreader and operate at the standard 1.1 V DDR5 voltage for the life of the system.

What is the first limit reached when the 4Rx4 registered ECC modules run at 4800 MT/s continuously?

The CAS latency of CL40 sets the timing boundary; sustained throughput cannot exceed the PC5-38400 data rate defined by the 4800 MT/s speed rating.

How much heat and power do the two 128 GB sticks draw when the Dell PowerEdge XR7620 runs all day?

Each module runs at 1.10 V without a heat spreader, so total power draw stays at the DDR5 1.1 V specification and thermal output remains within normal server DIMM limits.

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