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Two green DDR5 RDIMM modules with gold contacts and black chips, no heat spreader

NEMIX RAM

NEMIX RAM MR51200-924K2 128GB 2x64GB DDR5 6400 CL52 ECC Registered RDIMM memory upgrade

SKU CH-WEMN-4F4CP

128 GB DDR5 ECC registered RDIMM kit (2 × 64 GB) at 6400 MT/s CL52 1.1 V, validated for the Gigabyte MZ73-LM2 motherboard

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB 2X64GB

Show 24 more
  • 128 GB capacity from two 64 GB modules enables large workloads
  • DDR5 6400 speed with CL52 latency delivers rated throughput
  • Registered ECC design corrects errors and supports full population
  • 10 V operation matches the motherboard specification exactly
  • 288-pin RDIMM form factor fits the GIGABYTE MZ73-LM2 board

System-Specific DDR5 ECC Kit

This 128 GB kit contains two 64 GB Registered ECC DDR5 RDIMMs built for the GIGABYTE MZ73-LM2 motherboard. It delivers the exact rank, voltage and timing the board's memory controller expects so the full capacity is recognised at rated speed. Buyers needing unbuffered UDIMMs or a different pin count cannot use this kit.

Thermals, Noise and Power Draw

Operating at 1.10 V, the modules draw minimal power and run without a heat spreader in the server chassis airflow. Registered buffering reduces electrical load on the memory controller when every slot is populated. No active cooling is included, so adequate case ventilation is required for sustained workloads.

Build Quality and Daily Implications

Major-brand Samsung, Micron or Hynix ICs provide enterprise-grade stability with on-the-fly single-bit error correction. The 288-pin RDIMM form factor locks securely into the MZ73-LM2 slots following the board's population rules. Installers must verify the manual for supported capacities and slot order before seating the modules.

How it compares

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

Price $4,253.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $33.23 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 numberMR51200-924K2
Total capacity128 GB (2 × 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 systemsGIGABYTE
In the box
Included items128 GB 2 × 64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

How do I install the 288-pin DDR5 RDIMM modules in the GIGABYTE MZ73-LM2 and which population rule is commonly missed?

Power down, open the chassis, align each 288-pin DDR5 RDIMM with the keyed slot, press firmly until both latches click, then verify the motherboard manual for the exact DIMM sequence — many builders skip the prescribed order and the kit will not post at 128GB.

What maintenance or replacement will the 2Rx4 registered ECC kit need during its service life?

The modules have no heat spreader and no moving parts, so no scheduled maintenance is required; if a single-bit error exceeds ECC correction the DIMM must be replaced, and the lifetime replacement warranty covers that swap.

What limit appears first when the 6400 CL52 1.10V kit runs sustained workloads on the MZ73-LM2?

The memory controller's maximum supported DDR5 6400 speed is the first ceiling; all slots stay at rated frequency and voltage as long as the board's population rules are followed, so no thermal or voltage throttle occurs before that spec limit.

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