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

NEMIX RAM

NEMIX RAM DDR5 6400 256GB (2x128GB) CL52 2Rx4 1.1V ECC RDIMM memory upgrade for GIGABYTE MZ73-LM1

SKU CH-VFGX-MZMDF

256 GB DDR5 6400 registered ECC RDIMM kit with CL52 timing and 1.1 V operation, validated for the GIGABYTE MZ73-LM1 motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

Show 24 more
  • 256 GB capacity from two 128 GB modules enables large memory footprints
  • DDR5 6400 speed with CL52 latency delivers rated bandwidth for server workloads
  • Registered ECC design corrects single-bit errors and supports full-slot population
  • 1 V operation matches the motherboard's voltage requirement exactly
  • 288-pin RDIMM form factor fits the GIGABYTE MZ73-LM1 memory slots

Exact-match 256 GB kit for GIGABYTE MZ73-LM1

This NEMIX RAM kit delivers 256 GB as two 128 GB DDR5-6400 registered ECC RDIMMs. It matches the CL52 timing, 1.10 V voltage and 2Rx4 rank structure the MZ73-LM1 memory controller expects, so the full capacity is recognised at rated speed. The 288-pin registered form factor is the only type this board accepts.

Registered ECC architecture for full-slot population

Registered buffering offloads the memory controller, allowing every slot to run fully populated at the rated 6400 MT/s without signal degradation. On-die ECC detects and corrects single-bit errors in flight, preventing silent data corruption and unplanned reboots in production workloads. No heat spreaders are fitted, leaving clearance for dense server chassis airflow.

Two-module kit with lifetime support

The package contains exactly two 128 GB RDIMMs, pre-matched for dual-channel operation on the MZ73-LM1. Buyers who need more than 256 GB total capacity or who plan to mix ranks must consult the motherboard manual for approved population rules before ordering. Lifetime replacement coverage and US-based technical support are included.

How it compares

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

Price $8,590.99
Pricier than about 85% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $33.56 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 numberMR51200-724K2
Total capacity256 GB (2 × 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 items256 GB 2 × 128 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

Will the 1.1 V registered ECC RDIMM modules throttle under continuous server workloads?

The kit runs at the standard 1.1 V DDR5 voltage with registered buffering, so the memory controller is offloaded and the modules sustain their rated 6400 MT/s without thermal throttling under sustained load.

How much heat and fan noise do two 128 GB 2Rx4 RDIMMs add to a fully populated chassis?

Each module has no heat spreader and draws only 1.1 V, so the thermal contribution is minimal; the registered design keeps signal integrity high without extra power, leaving existing chassis airflow and acoustic profile essentially unchanged.

Does the GIGABYTE MZ73-LM1 require a specific BIOS revision or CPU stepping to recognise 256 GB of 2Rx4 DDR5 6400 RDIMM?

The kit is validated for the MZ73-LM1 motherboard at DDR5 6400 with 2Rx4 registered ECC; consult the board manual for the exact DIMM population order and any BIOS version notes before installation.

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