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

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400 CL52 4Rx4 1.1V ECC RDIMM Supermicro X14SRA-T memory upgrade

SKU CH-3069-ZQJPY

A 256 GB DDR5 server kit of two 128 GB registered ECC RDIMMs running at 6400 MT/s with CL52 latency and 1.1 V for the Supermicro X14SRA-T 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

Show 4 more
  • 256 GB total capacity from two 128 GB modules for maximum memory density
  • DDR5 6400 speed with CL52 latency delivers rated server performance
  • 1 V registered ECC design offloads the controller and corrects single-bit errors
  • 4Rx4 288-pin RDIMM form factor matches Supermicro X14SRA-T population rules exactly
  • Built with major OEM Samsung, Micron or Hynix chips for enterprise-grade reliability

Capacity and purpose

This NEMIX RAM kit delivers 256 GB of DDR5 memory in two 128 GB RDIMM modules. It is built for the Supermicro X14SRA-T motherboard where registered ECC memory is required for full-capacity operation at 6400 MT/s.

Who this suits and who it does not

The 4Rx4 registered ECC design suits servers that need maximum density with error correction and buffered signalling. Buyers who need unbuffered UDIMMs or non-ECC modules for a workstation or desktop platform cannot use this kit.

What to verify before ordering

Confirm that your X14SRA-T firmware revision supports 128 GB per slot and the approved population sequence for a two-module installation. The board manual lists the supported capacities, DIMM order, and any voltage or timing constraints that must match the 1.1 V CL52 specification.

How it compares

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

Price $8,580.99
Pricier than about 85% 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 $33.52 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

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Questions about this item

Does my Supermicro X14SRA-T motherboard need a specific BIOS version or CPU to recognise the 256 GB DDR5-6400 RDIMM kit?

The kit is validated for the X14SRA-T at DDR5-6400 (PC5-51200) with 4Rx4 registered ECC at 1.1 V; consult the motherboard manual for supported DIMM population order and any BIOS updates required for full 256 GB capacity.

Can I mix these 128 GB 4Rx4 modules with smaller 1Rx8 or 2Rx8 DDR5 RDIMMs already installed in the server?

Mixing different rank architectures (4Rx4 with 1Rx8 or 2Rx8) on the same channel is not recommended; the X14SRA-T memory controller expects uniform rank-per-channel configuration for stable operation at 6400 MT/s.

After installation, how do I confirm the system is running the full 256 GB at DDR5-6400 CL52 with ECC active?

Enter the BIOS/UEFI or use a tool like dmidecode on Linux; verify total capacity shows 256 GB, speed reads 6400 MT/s (PC5-51200), CAS latency 52, voltage 1.1 V, and ECC status reports "Enabled" or "Corrected".

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