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Two green DDR5 RDIMM modules with black chips, no heat spreader, 288 pins

NEMIX RAM

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

SKU CH-EZJZ-72VE3

A 256 GB DDR5 registered ECC kit with two 128 GB modules running at 4800 MT/s, CL40, 1.1 V for Supermicro 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
  • Massive 256GB capacity handles heavy workloads
  • DDR5 4800 speed feeds data fast to CPUs
  • ECC registered design protects data integrity
  • Low 1.1V voltage reduces server power draw
  • Validated for Supermicro SYS-211SE systems

Purpose-built server kit

This 256 GB kit supplies two 128 GB DDR5 registered DIMMs built for Supermicro IoT SuperServer SYS-211SE-31D, SYS-211SE-31A and X31SEED-F MBD platforms. ECC and registered signalling protect data integrity in mission-critical workloads.

Verify slot count and rank support

Confirm the motherboard provides at least two DDR5 RDIMM slots and accepts 4Rx4 modules at 1.1 V. Check the system manual for maximum capacity per channel and any population rules that limit rank combinations.

Steady throughput under load

Modules are stress-tested at 4800 MT/s with CL40 latency to sustain bandwidth during extended compute or virtualisation tasks. Registered buffering reduces electrical load on the memory controller, helping stability during continuous operation.

How it compares

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

Price $7,571.99
Pricier than about 84% 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 $29.58 per GB
Pricier than about 84% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro 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 systemsSupermicro
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

What comes in the box and do I need any extra parts to install it?

The kit includes two 128 GB DDR5 4800 CL40 1.10 V 4Rx4 ECC RDIMM modules, giving 256 GB total. No additional components are required for installation in a compatible Supermicro system.

Should I choose this 256 GB kit or a different capacity for my Supermicro server?

This 256 GB kit provides two 128 GB registered DIMMs; select it when your Supermicro SYS-211SE-31D, SYS-211SE-31A or X31SEED-F motherboard needs maximum supported capacity with ECC registered memory.

What does the 4800 MT/s rating mean once the memory is running in my server?

The modules operate at DDR5 4800 (PC5-38400) with CL40 latency at 1.10 V, delivering the rated throughput and error-correcting registered performance validated for the listed Supermicro platforms.

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