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Two green DDR5 RDIMM modules without heat spreaders, 288-pin, 128GB kit

NEMIX RAM

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

SKU CH-8EZN-CYJMR

128 GB DDR5-6400 ECC registered DIMM kit (2×64 GB, 2Rx4, CL52, 1.1 V) validated for the ASRock Rack TURIN2D24XGM/500W 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

  • 128 GB capacity from two 64 GB modules for dense server memory
  • DDR5 6400 speed with CL52 latency matches the board's rated timing
  • Registered ECC architecture offloads the controller and corrects single-bit errors
  • 10 V operation at the exact voltage the memory controller expects
  • 288-pin RDIMM form factor fits the ASRock Rack TURIN2D24XGM/500W motherboard

Targeted server upgrade

This 128GB kit provides two 64GB DDR5 6400 ECC Registered DIMMs built for the ASRock Rack TURIN2D24XGM/500W motherboard. It matches the board's required 288-pin RDIMM form factor, 2Rx4 rank structure, 1.10V operating voltage and CL52 latency so the memory controller recognises full capacity at rated speed.

Platform-specific limits

The modules operate only with systems that accept DDR5 6400 (PC5-51200) Registered ECC memory and follow the motherboard's validated population rules. Mixing with unbuffered UDIMMs, SODIMMs or different rank configurations will prevent boot or reduce stability, so the host platform must explicitly support this exact specification.

Daily handling implications

Chips from major OEM suppliers (Samsung, Micron, Hynix) are mounted on bare green PCBs without heat spreaders, relying on server chassis airflow for cooling. The 288-pin RDIMM keying prevents accidental insertion into incompatible slots, while registered buffering ensures electrical stability when all channels are fully populated in dense rack deployments.

How it compares

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

Price $4,321.99
Pricier than about 78% 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 $33.77 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 systemsASRock Rack
In the box
Included items128 GB 2 × 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

Should I choose the 128GB 2x64GB kit or a different capacity for my ASRock Rack TURIN2D24XGM/500W motherboard?

This 128GB kit provides two 64GB DDR5 6400 RDIMMs. Check your motherboard manual for the maximum supported capacity per slot and the approved population order before deciding.

What does the DDR5 6400 speed rating mean once the modules are installed in the server?

The modules will run at 6400 MT/s with CL52 latency at 1.1V, delivering PC5-51200 bandwidth, provided the motherboard memory controller supports that speed with a fully populated 2Rx4 configuration.

How does the 288-pin RDIMM interface and registered ECC design affect real-world operation?

The 288-pin RDIMM form factor fits the board's DDR5 slots. Registered buffering reduces electrical load on the memory controller, and ECC corrects single-bit errors to prevent data corruption.

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