We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 64GB DDR5 6400 PC5-51200 CL52 2Rx4 1.1V 288-pin ECC RDIMM for ASRock Rack GNR2D16-2T memory upgrade

SKU CH-J5BR-5AWQ2

64GB DDR5 6400 registered ECC RDIMM validated for ASRock Rack GNR2D16-2T motherboards

  • Total capacity64 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 64GB

Show 4 more
  • 64 GB DDR5-6400 capacity matches the ASRock Rack GNR2D16-2T spec for full-speed operation
  • CL52 latency at 1.10 V delivers rated throughput within the board's timing window
  • 2Rx4 registered ECC architecture enables full-slot population while correcting single-bit errors on the fly
  • 288-pin RDIMM form factor fits the motherboard's DDR5 slots exactly — no UDIMM or SODIMM mismatch
  • Built with Samsung, Micron or Hynix chips and covered by lifetime replacement support

64 GB DDR5-6400 ECC RDIMM for ASRock Rack

This 64 GB DDR5-6400 registered ECC RDIMM is built for the ASRock Rack GNR2D16-2T motherboard. It runs at 1.1 V with CL52 latency and a 2Rx4 organisation. The 288-pin module uses major-brand DRAM chips and has no heat spreader. It is an exact-match upgrade for that server platform.

Who this suits and who should look elsewhere

This module suits administrators expanding an ASRock Rack GNR2D16-2T system with validated registered ECC memory. It is not for desktop boards that require unbuffered UDIMMs, nor for laptops needing SODIMMs, and it will not work in systems limited to lower DDR5 speeds or different voltages.

The spec that decides fit

The motherboard must accept a 288-pin DDR5 RDIMM rated at 6400 MT/s, 1.1 V, CL52, 2Rx4 registered ECC. If the manual specifies a different rank, voltage, speed or form factor, this module will not be recognised or will run at reduced settings.

How it compares

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

Price $2,017.99
Pricier than about 68% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $31.53 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR51200-924K1
Total capacity64 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 items64 GB DDR5 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

5 more in the same range

Questions about this item

Will the 64GB DDR5 RDIMM need a firmware update or a heat spreader added later?

The module ships without a heat spreader and runs at the standard 1.1V; no firmware updates are required for the memory itself, and the bare DRAM design is the intended configuration for this 288-pin ECC RDIMM.

What limit appears first when the 2Rx4 registered DIMM runs continuously at 6400 MT/s?

Sustained operation at CL52 and 1.10V is constrained by the DDR5 JEDEC thermal envelope; the registered buffer and on-die ECC keep signal integrity within spec, so the thermal ceiling is reached before any electrical timing margin is exhausted.

How much extra power and noise does the 64GB kit add when the server runs all day?

At 1.1V the module draws only its rated DDR5 power budget with no active cooling of its own, so it adds negligible acoustic noise and the heat load stays within the server's existing airflow design.

More in Model-Specific Memory Upgrades

Similar items