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Six green DDR5 RDIMM modules with black chips and gold contacts

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 6400MHz CL52 2Rx4 1.1V ECC RDIMM Server Memory Upgrade

SKU CH-HMHJ-58W6S

Six 128 GB DDR5 modules deliver 768 GB of ECC registered server memory at 6400 MHz with CL52 latency and 1.1 V operation

  • Total capacity768 GB (6 × 128 GB)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Memory rank2Rx4
  • 768 GB total capacity across six 128 GB modules for dense server workloads
  • DDR5 6400 MHz speed with CL52 latency for high-throughput data processing
  • ECC registered RDIMM design detects and corrects memory errors in critical applications
  • 1 V operating voltage reduces power draw in large-scale deployments
  • Validated for Supermicro SuperServer SYS-822GS-NB3RT for guaranteed compatibility

Server-grade DDR5 ECC RDIMM kit

This 768 GB kit contains six 128 GB DDR5 6400 MHz CL52 2Rx4 registered DIMMs operating at 1.1 V. It is built for the Supermicro SuperServer SYS-822GS-NB3RT and other platforms that accept 288-pin DDR5 RDIMM modules with ECC. The registered design adds signal buffering for stable operation in multi-DIMM server configurations.

Upgrade from lower-capacity or slower DDR5 RDIMMs

Replacing smaller RDIMMs or slower DDR5 kits with this 6 x 128 GB set increases total memory bandwidth and rank density per channel. The jump is worth it when workloads exceed the capacity or throughput of existing modules and the motherboard supports the full 6400 MHz data rate with registered ECC DIMMs.

Handles large in-memory databases

The 768 GB total provides headroom for hundreds of virtual machines or multi-terabyte analytic datasets kept in RAM. Capacity runs out when the application working set grows beyond the installed 768 GB or when the platform's maximum supported memory per socket is lower than the kit size.

How it compares

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

Price $24,838.99
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 $32.34 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 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
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
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 the 288-pin DDR5 RDIMM modules fit the memory slots on a Supermicro SuperServer SYS-822GS-NB3RT?

Yes, the 288-pin DDR5 RDIMM form factor matches the DIMM slots on the Supermicro SuperServer SYS-822GS-NB3RT, and the kit is validated for that platform.

What is the correct installation sequence for the six 128GB 2Rx4 modules to avoid a boot failure?

Populate all six slots following the motherboard’s channel population guide, ensuring each 2Rx4 registered module seats fully until the retention clips lock.

When should the registered ECC RDIMMs be replaced if correctable error counts start rising in the system logs?

Replace modules when the platform’s memory health monitor reports increasing correctable ECC errors or when a firmware health check flags a specific DIMM.

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