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Twelve green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 768GB (12×64GB) DDR5 4800 CL40 ECC RDIMM SuperMicro FatTwin X13SEFR-A memory upgrade

SKU CH-7Z3P-FZ751

12-module 768 GB DDR5 4800 CL40 ECC registered RDIMM kit validated for SuperMicro FatTwin X13SEFR-A servers

  • Total capacity768 GB (12 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity from twelve 64 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered RDIMM design protects data integrity
  • 1 V operation reduces power draw at scale
  • Qualified for Supermicro FatTwin X13SEFR-A systems

768GB DDR5 ECC RDIMM kit

This NEMIX RAM kit delivers 768GB of DDR5 memory across twelve 64GB modules. It is built for SuperMicro FatTwin SuperServer systems including the SYS-F521E3-RTB and SYS-F511E2-RT. The registered ECC design targets enterprise workloads that require data integrity and high capacity.

Registered 2Rx4 organisation at 4800 MT/s

Each module operates at DDR5 4800 (PC5-38400) with CL40 latency and 1.10V voltage. The 2Rx4 rank configuration and registered buffer reduce electrical load on the memory controller, allowing all twelve 288-pin RDIMMs to run together in the supported SuperMicro X13SEFR-A platform.

Suited for IT teams scaling FatTwin density

This kit fits administrators who need the full 768GB population for virtualisation, database or HPC nodes on the listed SuperMicro servers. It is not for desktop or workstation boards that only accept unbuffered UDIMMs, nor for systems limited to fewer than twelve slots or lower maximum capacity.

How it compares

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

Price $18,474.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (12 × 64 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $24.06 per GB
Pricier than about 69% 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 numberMR38400-924K12
Total capacity768 GB (12 × 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 items768 GB (12 × 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 does the 4800 speed rating mean for throughput in a SuperMicro FatTwin X13SEFR-A server?

DDR5-4800 (PC5-38400) sets the data rate at 4800 MT/s; with twelve 64 GB modules installed the memory subsystem can move data at the full rated speed across all populated channels.

How does the 288-pin ECC RDIMM interface limit memory capacity or speed in this platform?

The 288-pin registered DIMM slots on the X13SEFR-A accept only DDR5 RDIMMs; each slot is capped at DDR5-4800, so the kit cannot exceed that speed and total capacity is limited to the number of slots the board provides.

What physical space and power does the 12-module kit need inside the FatTwin chassis?

Twelve 288-pin RDIMMs occupy twelve DIMM slots and draw 1.10 V each; the modules have no heat spreaders, so they fit standard server DIMM spacing without extra clearance.

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