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Two green DDR5 RDIMM modules, no heat spreaders, gold contacts visible

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 6400 CL52 1.1V 2Rx4 ECC RDIMM memory upgrade

SKU CH-QWJ5-QNCF4

A 256GB DDR5 6400 CL52 ECC RDIMM kit (2x128GB, 1.1V, 2Rx4) validated for ASRock Rack TURIN2D24XGM/500W

  • 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

  • 256 GB total capacity from two 128 GB modules
  • DDR5 6400 speed with CL52 latency at 1.1 V
  • Registered ECC design corrects single-bit errors automatically
  • 2Rx4 dual-rank organisation for full-capacity population
  • Exact match for ASRock Rack TURIN2D24XGM/500W motherboard

Exact-match DDR5 server kit

This 256 GB kit contains two 128 GB DDR5 RDIMM modules rated at 6400 MT/s with CL52 latency and 1.1 V operation. Registered ECC architecture and 2Rx4 organisation deliver the signal integrity and error correction required for production server workloads. The 288-pin form factor matches the ASRock Rack TURIN2D24XGM/500W motherboard specification.

Verify motherboard population rules

Check the system or motherboard manual for supported capacities, approved DIMM population order and installation steps before ordering. The board requires registered RDIMM modules, not unbuffered UDIMM or SODIMM variants. Confirm that your firmware revision recognises the full 256 GB capacity at the rated speed.

Sustained enterprise stability

Registered buffering offloads the memory controller so every slot runs fully populated at full capacity without signal degradation. On-die ECC corrects single-bit errors on the fly, preventing silent data corruption and unplanned reboots during continuous operation. Lifetime replacement coverage and US-based technical support back the deployment.

How it compares

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

Price $9,685.99
Pricier than about 87% 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 $37.84 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 systemsASRock Rack
In the box
Included items256 GB 2 × 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 kit include both 128 GB modules or do I need to buy a second kit?

The package contains the full 256 GB kit — two 128 GB DDR5 6400 CL52 1.1 V 2Rx4 ECC RDIMM modules — so nothing else is required for a 256 GB upgrade.

Should I choose this 256 GB 6400 CL52 kit or a different capacity or speed for my ASRock Rack TURIN2D24XGM/500W board?

This 256 GB DDR5 6400 CL52 2Rx4 RDIMM kit is the exact specification validated for the TURIN2D24XGM/500W; other capacities or speeds are not confirmed for this motherboard.

Will the DDR5 6400 rating actually run at 6400 MT/s once installed in the server?

Yes — the modules are spec-matched to the board's DDR5 6400 controller, so the memory controller recognises them at full capacity and operates at the rated 6400 MT/s speed.

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