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Six green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 768GB 6x128GB DDR5-6400 CL52 ECC RDIMM Supermicro H13SSL-NT

SKU CH-S76X-KMJD7

A 768 GB DDR5-6400 registered ECC kit of six 128 GB modules built to the Supermicro H13SSL-NT memory controller's exact rank, voltage and timing requirements

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 768 GB total capacity from six 128 GB modules
  • DDR5-6400 speed with CL52 latency for rated throughput
  • Registered ECC design corrects single-bit errors automatically
  • 10 V operation matches server memory-controller requirements
  • Verified fitment for Supermicro H13SSL-NT motherboard

768GB DDR5-6400 ECC RDIMM Kit

This 768GB kit contains six 128GB DDR5-6400 registered ECC modules built for the Supermicro H13SSL-NT motherboard. It targets server administrators who need maximum supported capacity with error correction and registered buffering for stable full-population operation.

2Rx4 Registered Architecture

Each module uses a 2Rx4 organisation with CL52 latency at 1.10V, matching the memory controller requirements of the H13SSL-NT. The registered design offloads electrical load so all six slots run at the rated DDR5-6400 speed without downclocking.

For H13SSL-NT Full Population

Suited for operators filling every DIMM slot on this specific Supermicro board with validated ECC RDIMMs. Not for systems that require unbuffered UDIMMs, SODIMM form factors, or lower-density modules outside the 128GB-per-DIMM specification.

How it compares

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

Price $24,208.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $31.52 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 numberMR51200-724K6
Total capacity768 GB (6 × 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 rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items768 GB 6 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Will this kit run at 6400 MT/s once installed in a Supermicro H13SSL-NT?

The modules are rated DDR5-6400 CL52 at 1.10 V. When populated in the supported slots of that motherboard, the memory controller will recognise the SPD profile and operate the kit at its rated 6400 MT/s speed.

Does the 288-pin RDIMM form factor and registered buffer match what the H13SSL-NT expects?

Yes. The kit uses 288-pin DDR5 RDIMMs with registered buffering and ECC, which is the exact module type the H13SSL-NT memory slots are designed to accept.

What physical clearance should I allow for these 128 GB modules in a 1U or 2U chassis?

The DIMMs have no heat spreader, so they sit at the standard low-profile height for registered DDR5 modules. This keeps them compatible with the tight clearances found in 1U and 2U server chassis.

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