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Two green DDR5 RDIMM modules, bare chips, no heat spreader

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 CL40 ECC RDIMM SuperMicro Server Memory Upgrade

SKU CH-T72N-33S24

A 256 GB DDR5 4800 kit of two 128 GB ECC RDIMM modules 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
  • 256 GB capacity with two 128 GB modules for high-density server workloads
  • DDR5 4800 speed rated at PC5-38400 for fast data throughput
  • ECC registered RDIMM with CL40 latency ensures data integrity under load
  • 10 V operating voltage reduces power draw in dense configurations
  • Validated for SuperMicro SYS-211SE-31DS, SYS-211SE-31AS and X31SEED-SF systems

256GB DDR5 ECC RDIMM kit for Supermicro servers

This 256GB kit contains two 128GB DDR5 4800 modules built for Supermicro IoT SuperServer platforms. Each stick is a 288-pin registered DIMM with on-die ECC and a 4Rx4 organisation. The 1.10V operating voltage matches the DDR5 baseline for server memory.

Sustained-load behaviour with registered ECC

The registered buffer reduces electrical load on the memory controller, allowing the full 256GB to remain stable under continuous server workloads. ECC corrects single-bit errors on the fly, preventing data corruption during long compute runs. CL40 latency is the standard timing for DDR5 4800 registered modules.

DDR5 4800 interface limits

The PC5-38400 rating defines the peak transfer rate of the DDR5 4800 interface. Registered DIMMs add one clock cycle of command delay, which is accounted for in the CL40 specification. Four-rank density per module maximises capacity per slot but may restrict maximum populated DIMM counts on some motherboards.

How it compares

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

Price $7,586.99
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 $29.64 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

How much power does each 128GB DDR5 4800 4Rx4 module draw at 1.10V during sustained server workloads?

Each module operates at 1.10V; DDR5 4800 4Rx4 registered ECC DIMMs typically draw 5–7 watts per stick under full load, so the pair stays well within a standard server memory power budget.

What motherboard slot type and BIOS support are required to run this 256GB DDR5 4800 ECC RDIMM kit?

A SuperMicro motherboard with 288-pin DDR5 RDIMM slots and BIOS that supports 4Rx4 registered ECC modules at 4800 MT/s is needed; the kit is validated for SYS-211SE-31DS, SYS-211SE-31AS and X31SEED-SF platforms.

Can I mix these 4800 CL40 4Rx4 DDR5 RDIMMs with slower DDR5 modules already installed in my SuperMicro server?

The memory controller will downclock all modules to the lowest common speed and highest latency; mixing ranks or speeds is possible but not recommended for mission-critical stability.

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