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Eight green 288-pin DDR4 RDIMM modules in a row, no heat spreaders, matte black PCB visible

NEMIX RAM

NEMIX RAM 512GB (8x64GB) DDR4 3200MHz CL22 2Rx4 ECC Registered RDIMM memory upgrade

SKU CH-X5XM-RF11K

Eight 64 GB DDR4 3200 MHz CL22 2Rx4 registered ECC RDIMMs validated for the Supermicro X12DPFR-AN6 motherboard

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered

Size 512GB 8X64GB

  • 512 GB capacity with eight 64 GB modules for maximum server density
  • DDR4 3200 MHz speed rated at PC4-25600 for high-throughput workloads
  • CL22 latency and 1.2 V operation matching the memory controller spec
  • 2Rx4 registered ECC RDIMM design prevents silent data corruption
  • 288-pin form factor validated for Supermicro X12DPFR-AN6 motherboard

Exact-match server kit

This 512GB kit contains eight 64GB DDR4 registered ECC RDIMMs built for the Supermicro X12DPFR-AN6 motherboard. Each module runs at 3200MHz with CL22 latency at 1.20V. The 2Rx4 dual-rank layout matches the board's memory controller expectations so the full capacity is recognised and operates at rated speed.

DDR4 RDIMM population limits

Registered DIMMs allow every slot to be filled without overloading the memory controller, yet the motherboard still defines the maximum supported capacity per socket and the required population order. Installing modules outside that sequence or exceeding the per-channel rank limit will prevent the system from booting or force reduced speeds.

Guided installation steps

Align the 288-pin key notch with the slot, press straight down until the retention clips click, and follow the manual's exact slot sequence for eight modules. Common issues are mixing RDIMMs with unbuffered UDIMMs, skipping a required slot, or using a BIOS version that does not yet support the full 512GB configuration.

How it compares

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

Price $3,427.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $6.70 per GB
Cheaper than about 59% 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 nameDDR4 ECC RDIMM Registered Server Memory
Part numberMR25600-924K8
Total capacity512 GB (8 × 64 GB)
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB 8 × 64 GB DDR4 3200 MHz PC4-25600 2Rx4 1.2 V 288-PIN ECC RDIMM KIT

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 8×64 GB kit or a different capacity for my Supermicro X12DPFR-AN6?

The kit provides 512 GB total across eight 64 GB modules, matching the board's DDR4-3200 Registered ECC requirement and 288-pin RDIMM form factor.

What does the DDR4-3200 (PC4-25600) rating mean once installed in the server?

The modules run at 3200 MT/s with CL22 latency at 1.2 V, delivering the full rated bandwidth the memory controller expects when all slots are populated.

How does the Registered ECC 2Rx4 design affect stability and slot population?

Registered buffering offloads the memory controller so every slot runs fully populated at full capacity, while ECC corrects single-bit errors on the fly.

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