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Four green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM MR51200-724K4 512GB (4 x 128GB) DDR5 6400 CL52 1.1V 2Rx4 ECC Registered RDIMM memory upgrade

SKU CH-RKY6-3YQYA

512GB DDR5 ECC registered RDIMM kit of four 128GB modules at 6400MHz CL52 1.1V for ASRock Rack GNRAPD12DNO motherboards

  • 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 for memory-intensive server workloads
  • DDR5-6400 speed with CL52 latency for responsive data handling
  • Registered ECC design corrects single-bit errors to prevent silent data corruption
  • 1 V operation reduces power draw across four fully populated slots
  • Exact-fit 288-pin RDIMM kit validated for ASRock Rack GNRAPD12DNO motherboard

Capacity and form factor

This kit provides 512 GB of DDR5 server memory across four 128 GB registered RDIMM modules. It is built for the ASRock Rack GNRAPD12DNO motherboard and suits administrators who need maximum supported capacity with ECC protection.

Installation and fit

The 288-pin registered DIMMs install in the standard DDR5 slots of the target board; registered architecture lets all four slots run fully populated at rated speed. Verify the motherboard manual for approved population order and any BIOS settings before seating the modules.

Speed, latency and voltage

Rated DDR5 6400 (PC5-51200) with CL52 latency at 1.10 V, the kit matches the exact timing and voltage the memory controller expects for stable operation at full capacity.

How it compares

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

Price $18,567.99
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 $36.27 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

Other versions of this model

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Questions about this item

How can I verify the 512GB kit is running at DDR5 6400 CL52 after installation?

Check the BIOS memory information screen or a tool such as CPU-Z; it should report 6400 MT/s, CAS latency 52, 1.10 V and all four 128 GB modules recognised as a 512 GB Registered ECC 2Rx4 configuration.

What does the package contain and is anything else required to use it?

The box holds the 512 GB kit as four 128 GB 288-pin DDR5 RDIMMs; no extra parts are needed if your ASRock Rack GNRAPD12DNO motherboard has four free RDIMM slots and supports the stated speed and voltage.

Should I choose this 512 GB (4 × 128 GB) kit or a different capacity for the GNRAPD12DNO?

Select this kit when the board's qualified-vendor list approves 128 GB 2Rx4 RDIMMs and you need the maximum 512 GB across four slots; choose a smaller kit only if your manual limits per-slot capacity or total memory.

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