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Two green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400MHz ECC RDIMM 4Rx4 1.1V Supermicro X14SBI-F memory upgrade

SKU CH-X2XG-6VVDS

Adds 256 GB of DDR5 ECC registered memory at 6400 MHz for Supermicro X14SBI-F servers

  • 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
  • 6400 MHz DDR5 speed with PC5-51200 bandwidth
  • ECC registered RDIMM with 4Rx4 organisation for data integrity
  • 1 V operating voltage for efficient power draw
  • Validated for Supermicro X14SBI-F motherboard compatibility

256GB DDR5 ECC RDIMM Kit

This 256GB kit contains two 128GB DDR5 registered DIMMs built for the Supermicro X14SBI-F platform. Error-correcting code and registered signalling protect data integrity in server and workstation workloads. The modules run at 6400MHz with a CL52 latency at 1.1V. IT professionals handling mission-critical environments are the target audience.

Fits Supermicro X14SBI-F DIMM Slots

The 288-pin RDIMMs install directly into the board’s DDR5 slots without adapters or cables. Registered buffering reduces electrical load on the memory controller, freeing headroom for high-density population. No heat spreaders are fitted, so airflow in the chassis must be sufficient for the bare modules. Builders needing unbuffered or non-ECC memory cannot use this kit.

Replaces Lower-Capacity DDR5 RDIMMs

Swapping smaller registered modules for this 2x128GB kit doubles or quadruples usable memory per channel, which benefits virtualisation, large datasets and AI inference workloads. The upgrade is worth it when the application hits capacity limits on the existing configuration. Systems requiring higher frequencies or lower latencies than 6400MHz CL52 will not gain from this change.

How it compares

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

Price $9,559.99
Pricier than about 86% 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 $37.34 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

Will the 6400 MHz speed hold under continuous server workloads?

The kit is rated at 6400 MHz PC5-51200 with CL52 latency; sustained throughput depends on the Supermicro X14SBI-F memory controller and cooling.

How much heat and power do two 128 GB modules draw at 1.1 V all day?

Each module runs at 1.10 V without a heat spreader; total power scales with load and the platform’s voltage regulation.

What motherboard feature is required to use 4Rx4 registered ECC DIMMs?

The Supermicro X14SBI-F must support DDR5 288-pin RDIMM slots with registered ECC and 4Rx4 addressing.

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