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Two green DDR5 RDIMM sticks, no heat spreaders, 288-pin gold contacts

NEMIX RAM

NEMIX RAM 256GB 2x128GB DDR5-6400 CL52 4Rx4 RDIMM ECC Supermicro X14SDW-36C-SP9F

SKU CH-EAHY-CDFAX

256GB DDR5-6400 registered ECC kit (2×128GB, CL52, 1.1V, 4Rx4) validated for the Supermicro X14SDW-36C-SP9F motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

  • 256 GB capacity with two 128 GB modules for maximum server memory density
  • DDR5 6400 speed rated at PC5-51200 for high-throughput workloads
  • Registered ECC design corrects single-bit errors to prevent silent data corruption
  • 4Rx4 organisation and 1.1 V voltage match the Supermicro X14SDW-36C-SP9F memory controller exactly
  • 288-pin RDIMM form factor fits the motherboard's registered DIMM slots without adapters

Exact-match 256GB DDR5-6400 kit

This 256GB kit contains two 128GB DDR5-6400 Registered ECC RDIMMs built to the Supermicro X14SDW-36C-SP9F memory controller specification. The modules run at 1.10V with CL52 latency and a 4Rx4 rank structure so the board recognises the full capacity at rated speed.

Sustained enterprise stability

Registered architecture buffers every address and command line, letting all slots stay fully populated without signal degradation during continuous workloads. On-die ECC corrects single-bit errors in real time, preventing silent data corruption and unplanned reboots on production systems.

Replaces partial or slower populations

The kit upgrades a partially filled board or slower DDR5 modules to the maximum validated 256GB at DDR5-6400. The jump is worth it when the workload demands full registered capacity and ECC integrity at the board's highest supported data rate.

How it compares

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

Price $8,128.99
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 $31.75 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 lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-744K2
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
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

Other versions of this model

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Questions about this item

How much power does the 1.1V DDR5-6400 kit draw when the server runs all day?

Each module operates at 1.1V, the standard voltage for DDR5-6400 RDIMMs; total system power depends on CPU load and the Supermicro X14SDW-36C-SP9F motherboard's memory-controller efficiency.

What motherboard and memory slots are required for this 288-pin RDIMM kit to function?

The kit is validated for the Supermicro X14SDW-36C-SP9F motherboard, which must provide DDR5 RDIMM slots and follow the board's population rules for 4Rx4 registered modules.

Will the 4Rx4 registered ECC modules work alongside other DDR5 RDIMMs I might keep in the remaining slots?

Mixing ranks is possible only if the Supermicro X14SDW-36C-SP9F manual approves the specific population order; the board's memory controller must support 4Rx4 modules in every populated channel.

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