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Four green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 6400MHz CL52 2Rx4 ECC Registered RDIMM memory upgrade

SKU CH-HD47-CA2PF

A 256GB DDR5 registered ECC kit of four 64GB modules running at 6400MHz CL52 1.1V, validated for the ASRock Rack GNRAPD12DNO motherboard

  • Capacity256GB (4 x 64GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 6400 (PC5 51200)
  • CAS LatencyCL52
  • Voltage1.10V
  • ECCYes

Size 256GB 4X64GB

Show 4 more configurations
  • 256 GB total capacity in a four-module kit for maximum server density
  • DDR5 6400 MT/s speed with CL52 latency for high-throughput workloads
  • Registered ECC RDIMM design with 2Rx4 organisation for full-slot stability
  • 1 V operation reduces power draw in fully populated systems
  • Verified compatibility with ASRock Rack GNRAPD12DNO motherboard

Server Memory Kit

This NEMIX RAM kit delivers 256GB of DDR5 memory across four 64GB modules running at 6400MHz with CL52 latency. The registered ECC RDIMM design operates at 1.10V and uses a 2Rx4 rank configuration. It is built for the ASRock Rack GNRAPD12DNO motherboard where full-capacity population and error correction are required.

Suited for registered ECC platforms

The 288-pin registered form factor and ECC function suit servers that demand data integrity and stable operation with all slots filled. Systems needing unbuffered UDIMMs, non-ECC memory, SODIMM modules, or a different DDR generation will not accept this kit.

Build integration

Four modules populate the board's DDR5 RDIMM slots at the rated 6400MHz speed and 1.10V voltage. The registered architecture reduces electrical load on the memory controller when fully populated, while ECC corrects single-bit errors in flight. Verify the motherboard manual for approved population order and maximum supported capacity before installation.

Highlights

  • 256 GB total capacity in a four-module kit for maximum server density
  • DDR5 6400 MT/s speed with CL52 latency for high-throughput workloads
  • Registered ECC RDIMM design with 2Rx4 organisation for full-slot stability
  • 1 V operation reduces power draw in fully populated systems
  • Verified compatibility with ASRock Rack GNRAPD12DNO motherboard

Specifications

BrandNEMIX RAM
SeriesNEMIX RAM Original Series Server Memory
ModelDDR5 ECC RDIMM Registered Server Memory
Part NumberMR51200-924K4
Capacity256GB (4 x 64GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 6400 (PC5 51200)
CAS LatencyCL52
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
ChipsetMajor OEM Samsung, Micron, Hynix
Heat SpreaderNo
Compatible SystemASRock Rack
FeaturesDDR5 ECC RDIMM Motherboard Compatible
Package Content256GB 4X64GB DDR5 6400MHz PC5-51200 2Rx4 1.1V 288-PIN ECC RDIMM KIT

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Must my ASRock Rack GNRAPD12DNO motherboard already support DDR5 6400 PC5-51200 registered ECC RDIMMs for this 256GB kit to work?

Yes — the board must accept 288-pin DDR5 RDIMMs at 6400 MT/s with registered ECC; this kit is spec-matched to that exact requirement.

Can I keep any existing DDR5 6400 registered ECC RDIMMs installed while adding these four 64GB 2Rx4 modules?

Only if the motherboard manual approves mixing 2Rx4 ranks in the same channel population; otherwise the board may not train at full 6400 speed.

How do I confirm the system sees all 256GB at DDR5 6400 CL52 1.1V after installation?

Enter BIOS or run a tool like dmidecode — each slot should show 64GB, 6400 MT/s, CL52, 1.1 V, registered ECC, 2Rx4 organisation.

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