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Six green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM MR51200-724K6 768GB (6×128GB) DDR5 6400 ECC Registered RDIMM memory upgrade

SKU CH-3WFV-80ASA

768GB DDR5-6400 ECC Registered RDIMM kit in six 128GB modules at 1.1V CL52, validated for the GIGABYTE MZ73-LM1 motherboard

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 768GB 6X128GB

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  • 768 GB total capacity across six 128 GB modules for maximum server density
  • DDR5 6400 speed with CL52 latency delivers rated throughput for demanding workloads
  • Registered ECC architecture offloads the controller and corrects single-bit errors automatically
  • 10 V operation matches the motherboard specification for stable full-population performance
  • Verified compatibility with the Gigabyte MZ73-LM1 motherboard for exact-fit installation

Exact-Match 768GB Kit for GIGABYTE MZ73-LM1

This 768GB kit contains six 128GB DDR5 6400 RDIMMs built to the GIGABYTE MZ73-LM1 motherboard's exact specifications. Registered ECC architecture with 2Rx4 organisation and CL52 timing ensures the memory controller recognises full capacity at rated speed. The 1.10V modules use major OEM Samsung, Micron or Hynix components without heat spreaders.

Sustained Load Stability

Registered buffering offloads the memory controller so all six slots remain stable at full population during continuous server workloads. On-die ECC detects and corrects single-bit errors in real time, preventing silent data corruption and unplanned reboots under prolonged stress. The 1.10V operating voltage maintains consistent power draw across extended duty cycles.

DDR5 6400 Interface Limits

The PC5-51200 interface delivers 6400 MT/s bandwidth within the DDR5 standard's electrical and timing constraints. CL52 latency and 2Rx4 rank density define the practical throughput ceiling for this registered DIMM topology. Motherboard memory-population rules and maximum supported capacity per slot govern final configuration possibilities.

How it compares

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

Price $27,063.99
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 $35.24 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 systemsGIGABYTE
In the box
Included items768 GB 6 × 128 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 1.10 V registered ECC design keep heat and power draw low when all six 128 GB modules run at DDR5 6400 continuously?

The kit operates at 1.10 V with registered buffering, which reduces electrical load on the memory controller and helps maintain stable thermals during sustained full-capacity workloads.

Must the GIGABYTE MZ73-LM1 motherboard already be installed to use this 6 × 128 GB RDIMM kit?

Yes, the modules are 288-pin DDR5 RDIMMs validated for the GIGABYTE MZ73-LM1, so that motherboard — or another platform with identical DDR5 RDIMM slots and population rules — is required.

Can I mix these 2Rx4 CL52 registered ECC DIMMs with older registered ECC modules of different rank or speed in the same server?

Mixing ranks, speeds, or latencies is not recommended; the motherboard's memory population rules should be followed to ensure all slots run at the rated DDR5 6400 CL52 configuration.

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