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Four green DDR5 RDIMM modules in static bags

NEMIX RAM

NEMIX RAM 512GB 4x128GB DDR5 6400 CL52 2Rx4 ECC Registered RDIMM ASRock Rack GNRAP2D24G-2L+ memory upgrade

SKU CH-21KY-AA9GT

A 512 GB kit of four 128 GB DDR5 6400 CL52 2Rx4 ECC registered RDIMMs at 1.1 V, validated for the ASRock Rack GNRAP2D24G-2L+ motherboard

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

Show 4 more
  • 512 GB total capacity from four 128 GB modules
  • DDR5 6400 speed with CL52 latency at 1.10 V
  • Registered ECC architecture for error correction and stability
  • 288-pin RDIMM form factor matched to ASRock Rack board
  • Built with major OEM Samsung, Micron or Hynix chips

Exact-Match Server Memory Kit

This 512GB kit contains four 128GB DDR5 Registered ECC RDIMMs built to the precise rank, voltage and timing the ASRock Rack GNRAP2D24G-2L+ motherboard expects. It arrives new and is ready for immediate installation in compatible systems.

Build Integration Requirements

The 288-pin RDIMM form factor fits only motherboards designed for Registered DDR5 memory, not UDIMM or SODIMM slots. Registered buffering offloads the memory controller so every slot can run fully populated at the rated 6400 speed, while ECC corrects single-bit errors on the fly.

Suited For Stable Capacity Needs

Ideal for administrators who need the full 512GB capacity at DDR5-6400 with verified fitment on the specified ASRock Rack board. Not for buyers who need heat spreaders, lower CAS latency, non-ECC modules, or a different pin count or voltage than the 1.1V 288-pin specification.

How it compares

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

Price $18,238.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $35.62 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 numberMR51200-724K4
Total capacity512 GB (4 × 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 items512 GB 4 × 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 CL52 latency hold when all four 128 GB modules run at 6400 MT/s continuously?

The kit is rated DDR5-6400 CL52 at 1.10 V with 2Rx4 registered ECC; sustained operation at those timings is the validated specification.

How much heat and power should I expect from the four 1.10 V RDIMMs under full load?

Each module runs at 1.10 V with no heat spreader; registered buffering reduces controller load, so total power scales with the 512 GB capacity at the rated voltage.

Does the ASRock Rack GNRAP2D24G-2L+ require a specific DIMM population order for this 4 x 128 GB kit?

The board's memory-population rules determine slot order; consult the motherboard manual for the approved installation sequence before fitting all four RDIMMs.

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