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Sixteen green DDR5 RDIMM modules without heat spreaders in a kit box

NEMIX RAM

NEMIX RAM DDR5 6400 256GB 16x16GB ECC Registered RDIMM Supermicro H14DSG-O-CPU memory upgrade

SKU CH-ZTXT-SYJW6

256 GB kit of 16 registered ECC DDR5 RDIMMs at 6400 MT/s, CL52, 1.1 V, validated for the Supermicro H14DSG-O-CPU motherboard

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 256 GB capacity across 16 modules for dense server workloads
  • DDR5-6400 speed with CL52 latency for rated performance
  • Registered ECC design corrects single-bit errors on the fly
  • 1 V operation at 1Rx8 rank for full-slot stability
  • Verified fit for Supermicro H14DSG-O-CPU 288-pin RDIMM slots

Exact-match DDR5-6400 RDIMM kit for Supermicro

This 256GB kit contains sixteen 16GB DDR5-6400 (PC5-51200) registered ECC RDIMMs. Each module runs at 1.1V with CL52 latency and 1Rx8 organisation. The 288-pin RDIMM form factor matches the motherboard's memory-controller requirements for full-capacity recognition at rated speed.

Suited for servers needing maximum registered ECC

Ideal for administrators populating every slot on a Supermicro H14DSG-O-CPU board with validated registered ECC memory. Not suitable for systems that require unbuffered UDIMMs, SODIMMs, non-ECC modules, or a different DDR generation. Buyers needing lower capacities or alternative speeds should verify their platform's qualified-vendor list first.

Sixteen ranks deliver 256GB at DDR5-6400

The 1Rx8 registered design lets the memory controller drive all sixteen slots at the full 6400MT/s data rate with ECC protection. Headroom exists for heavily threaded workloads and large in-memory datasets. Capacity runs out when the application footprint exceeds 256GB or the platform's maximum supported memory per socket is lower than the installed total.

How it compares

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

Price $7,794.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $30.45 per GB
Pricier than about 87% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-618K16
Total capacity256 GB (16 × 16 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 rank1Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB 16 × 16 GB DDR5 6400 MHz PC5-51200 1Rx8 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

What motherboard must I have for this 256GB DDR5-6400 ECC RDIMM kit to be recognised at full capacity?

The kit is verified for the Supermicro H14DSG-O-CPU motherboard; its memory controller expects 1Rx8 registered ECC modules at 1.1V with CL52 timing, and the board’s 288-pin RDIMM slots match the kit exactly.

Can I mix these 1.1V CL52 registered ECC RDIMMs with slower DDR5 modules already installed in the same H14DSG-O-CPU system?

The board will down-clock all populated slots to the slowest common speed and loosest timing, so every module must be rated for DDR5-6400 CL52 at 1.1V to keep the kit running at its rated 6400 MT/s.

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

Check the BIOS memory information screen or run a tool such as dmidecode; it should report 256GB total, 16 modules, speed 6400 MT/s, type DDR5, ECC enabled, and registered (buffered) operation.

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