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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 512GB 8x64GB DDR5 4800 CL40 2Rx4 ECC RDIMM SuperMicro FatTwin X13SEFR-A

SKU CH-PBSN-NBFG8

Eight 64 GB DDR5 4800 CL40 ECC registered DIMMs totalling 512 GB for SuperMicro FatTwin X13SEFR-A servers

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity across eight 64 GB modules
  • DDR5 4800 MT/s speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM design for server data integrity
  • 2Rx4 dual-rank organisation on 288-pin DDR5 form factor
  • Validated for SuperMicro FatTwin X13SEFR-A systems

Server memory kit

This 512 GB kit supplies eight 64 GB DDR5 registered DIMMs built for SuperMicro FatTwin SuperServer systems SYS-F521E3-RTB, SYS-F511E2-RT and X13SEFR-A. ECC and registered buffering protect data integrity in mission-critical workloads. The modules run at 4800 MT/s with CL40 latency at 1.1 V.

288-pin registered DIMMs

Each stick uses a 288-pin DDR5 RDIMM form factor with 2Rx4 organisation and no heat spreader, so they fit standard server DIMM slots without clearance issues. Major OEM Samsung, Micron or Hynix chips are rigorously stress-tested under load before shipping. The registered design reduces electrical load on the memory controller for stable operation in dense configurations.

512 GB total capacity

The eight-module population fills all available channels on supported FatTwin nodes, delivering maximum memory bandwidth for virtualization, database and HPC tasks. Systems needing less capacity or non-ECC memory cannot use this kit. Buyers requiring different speeds, voltages or form factors should verify their platform specifications first.

How it compares

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

Price $13,037.99
Pricier than about 90% 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 $25.46 per GB
Pricier than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K8
Total capacity512 GB (8 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB (8 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What speed and latency does the DDR5 4800 kit run at in this SuperMicro FatTwin?

The kit operates at 4800 MT/s with CAS latency 40, delivering PC5-38400 bandwidth across all eight registered modules.

What physical slot and module count does the 512 GB kit require?

Eight 288-pin DDR5 RDIMM slots are needed; each module is a 64 GB 2Rx4 registered DIMM without a heat spreader.

How are the eight RDIMMs installed in the SuperMicro X13SEFR-A and what step is often missed?

Populate all eight channels following the motherboard's population order, then enable ECC in BIOS so the registered modules initialise correctly.

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