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Twelve green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM DDR5 768GB 12x64GB 6400MHz CL52 2Rx4 ECC Registered RDIMM memory upgrade

SKU CH-NCRF-BY6KH

768GB DDR5 server memory kit with twelve 64GB registered ECC RDIMMs at 6400MHz CL52 1.1V for ASRock Rack TURIN2D24XGM/500W motherboards

  • 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

  • 768 GB total capacity from 12 matched 64 GB modules for maximum server density
  • DDR5 6400 speed with CL52 latency delivers rated bandwidth at 1.1 V
  • Registered ECC RDIMM architecture enables full-slot population while correcting single-bit errors
  • 288-pin 2Rx4 form factor verified for ASRock Rack TURIN2D24XGM/500W motherboard
  • Lifetime replacement warranty with US-based technical support included

Capacity and form factor

This is a 768 GB DDR5 memory kit comprising twelve 64 GB Registered ECC RDIMMs. It targets administrators upgrading an ASRock Rack TURIN2D24XGM/500W motherboard that demands the 288-pin RDIMM form factor and registered signalling. Builders using unbuffered UDIMMs or SODIMMs cannot install this kit.

Registered architecture and rank

The decisive specification is the 2Rx4 registered layout with ECC at CL52. Registered buffering offloads the memory controller so all twelve slots can run fully populated, while ECC corrects single-bit errors on the fly. Modules with different rank organisation or unbuffered design will not be recognised at full capacity.

Sustained operation

Operating at 1.1 V and DDR5-6400, the kit maintains rated speed and stability across fully populated channels under continuous server workloads. The registered design prevents the signal degradation that limits unbuffered modules in dense configurations. Buyers needing higher frequencies or lower latencies should verify motherboard support before ordering.

How it compares

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

Price $24,084.99
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 $31.36 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

5 more in the same range

Questions about this item

Will the 6400 MHz speed run at full rate when all 12 slots of the ASRock Rack TURIN2D24XGM/500W are populated?

Yes. The registered (buffered) architecture offloads the memory controller so every slot runs fully populated at the rated DDR5 6400 speed.

What does the PC5-51200 designation cap in practice for this kit?

PC5-51200 is the peak transfer rate label for DDR5 6400; the modules will not exceed that bandwidth on this motherboard.

Do the 288-pin RDIMMs fit the ASRock Rack TURIN2D24XGM/500W without adapters?

Yes. The kit uses the exact 288-pin registered RDIMM form factor the board requires, not UDIMM or SODIMM.

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