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Twelve green DDR5 RDIMM modules in anti-static packaging

NEMIX RAM

NEMIX RAM 768GB (12x64GB) DDR5 6400 CL52 2Rx4 1.1V ECC RDIMM memory upgrade

SKU CH-BC71-MBXSM

A 768GB kit of twelve 64GB DDR5 RDIMMs at 6400 CL52 1.1V 2Rx4 ECC registered for ASRock Rack GNRAPD12DNO

  • Total capacity768 GB (12 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 768GB 12X64GB

Show 4 more
  • 768GB capacity from 12 x 64GB modules for maximum server density
  • DDR5 6400 speed with CL52 latency delivers rated throughput
  • 1V registered ECC RDIMM ensures stable fully-populated operation
  • 2Rx4 288-pin form factor matches ASRock Rack GNRAPD12DNO requirements
  • Major OEM Samsung, Micron, Hynix chips provide enterprise-grade reliability

Exact-match server memory kit

This 768GB kit contains twelve 64GB DDR5 6400 RDIMMs built to the precise rank, voltage and timing the ASRock Rack GNRAPD12DNO motherboard expects. Registered ECC architecture offloads the memory controller and corrects single-bit errors on the fly, so every slot runs fully populated at rated speed without silent data corruption.

Verify platform rules before ordering

Consult your system or motherboard manual for supported capacities, approved DIMM population order and installation steps. The modules are 288-pin Registered DDR5 RDIMMs operating at 1.1V with CL52 latency; they are not compatible with UDIMM or SODIMM slots and will not function in boards that require a different form factor or voltage.

Twelve-module population for maximum capacity

Populating all twelve slots delivers the full 768GB capacity while the registered design keeps electrical loading on the memory controller low. ECC protection runs continuously, freeing the system from unplanned reboots caused by soft errors and leaving CPU resources available for production workloads.

How it compares

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

Price $26,697.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (12 × 64 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $34.76 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 numberMR51200-924K12
Total capacity768 GB (12 × 64 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 systemsASRock Rack
In the box
Included items768 GB 12 × 64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Does the kit include all 12 modules or must any be purchased separately?

The kit contains twelve 64 GB DDR5 RDIMM modules for a total of 768 GB; nothing else is required to reach that capacity.

Why choose the 12 x 64 GB 6400 CL52 2Rx4 kit instead of a smaller capacity?

This 768 GB kit matches the ASRock Rack GNRAPD12DNO motherboard's supported population rules, delivering the maximum registered ECC capacity at the rated 6400 MT/s speed.

What does the 6400 MT/s rating mean once the modules are installed in the server?

The memory controller will recognise each 2Rx4 registered DIMM at 1.1 V and run the full 12-module population at DDR5-6400 with CL52 latency.

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