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

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400MHz ECC RDIMM memory upgrade

SKU CH-1AD4-EDEDQ

A 256 GB registered DDR5 server memory kit with ECC, CL52 latency and 1.1 V operation, validated for Supermicro X14SBM-TF systems

  • Total capacity256 GB (2 × 128 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank4Rx4
  • 256 GB total capacity for large server workloads
  • DDR5 6400 MHz speed with PC5-51200 bandwidth
  • ECC registered design protects data integrity
  • 1 V low-voltage operation reduces power draw
  • 288-pin RDIMM form factor fits Supermicro X14SBM-TF

256GB DDR5 ECC RDIMM kit for Supermicro servers

This 256GB kit contains two 128GB DDR5 6400MHz registered DIMMs built for Supermicro X14SBM-TF platforms. The modules deliver ECC error correction and 4Rx4 organisation for dense memory configurations. System integrators and IT teams use it to expand capacity in workloads that demand data integrity and registered signalling.

Registered DDR5 at 1.1V with CL52 latency

Each module operates at 1.10V with a CAS latency of 52 cycles under the PC5-51200 standard. The registered buffer reduces electrical load on the memory controller while ECC corrects single-bit errors in flight. No heat spreader is fitted, so airflow across the 288-pin PCB manages thermals in typical server chassis.

Replaces smaller RDIMM pairs when capacity limits

Upgrading from lower-density registered kits removes the bottleneck that forces swapping or limits virtual-machine density. The jump is worth it when the platform supports 128GB per slot and the workload benefits from 256GB of ECC-protected address space without adding modules.

How it compares

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

Price $9,688.99
Pricier than about 87% 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 $37.85 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSupermicro Compatible Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server RAM
Part numberMR51200-744K2
Total capacity256 GB (2 × 128 GB)
Product type288-PIN DDR5 RDIMM
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
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 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

How do I install these 288-pin DDR5 RDIMMs in a Supermicro X14SBM-TF, and what step is commonly missed?

Power off the server, open the chassis, align each 288-pin module with the DDR5 slot key, press firmly until both retention clips click, then verify in BIOS that both 128GB modules are detected at 6400MHz; the step often missed is fully seating both clips so the registered buffer initialises correctly.

What maintenance or replacement will this 256GB ECC RDIMM kit need over its service life?

No scheduled maintenance is required; the modules have no heat spreader and run at 1.1V, so only occasional dust removal from the DIMM slots is needed, and ECC correction handles single-bit errors transparently until a module fails, at which point the faulty 128GB stick is replaced under lifetime warranty.

What limit appears first when this 4Rx4 DDR5-6400 kit runs sustained workloads on the X14SBM-TF?

The CAS latency of CL52 at 6400MHz sets the timing ceiling; under continuous load the memory controller hits this latency bound before thermal or voltage limits, because the registered design and 1.10V operation keep power draw and temperature within spec.

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