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Sixteen green DDR5 RDIMM sticks, bare chips, no heat spreaders, in a clear tray

NEMIX RAM

NEMIX RAM 1TB (16x64GB) DDR5 4800 ECC RDIMM memory upgrade

SKU CH-TKN6-EMSZS

1 TB registered DDR5 ECC kit with 16 modules of 64 GB at 4800 MT/s, CL40, 1.1 V, 2Rx4, 288-pin for Supermicro servers

  • Total capacity1 TB (16 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 1TB total capacity from 16 x 64GB modules
  • DDR5 4800 speed for high-throughput server workloads
  • ECC registered RDIMM design protects data integrity
  • 10V operation reduces power draw per module
  • Validated for Supermicro FatTwin SYS-F521E3-RTB and SYS-F511E2-RT systems

Server memory kit for Supermicro FatTwin

This NEMIX RAM kit delivers 1 TB of DDR5 4800 registered ECC memory across sixteen 64 GB modules. It is built for Supermicro FatTwin SuperServer SYS-F521E3-RTB, SYS-F511E2-RT and X13SEFR-A platforms that require 288-pin RDIMM registered DIMMs. The modules run at 1.10 V with CL40 latency and use major OEM Samsung, Micron or Hynix chips.

Suited for high-density FatTwin deployments

Administrators populating all DIMM slots in the listed FatTwin models will match the validated 2Rx4 rank configuration and registered ECC buffer. Systems needing unbuffered UDIMM modules, lower capacities per slot or non-ECC memory cannot use this kit. Workstations or servers outside the named Supermicro families should verify motherboard qualification before purchase.

Straightforward DIMM installation

Each 288-pin RDIMM seats in the standard DDR5 server slot; no heat spreader is present, so airflow clearance is minimal. The most common issue is mixing registered ECC modules with unbuffered or non-ECC DIMMs, which prevents boot. Follow the Supermicro memory population guide for the specific FatTwin chassis to ensure correct channel balancing.

How it compares

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

Price $27,900.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (16 × 64 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $27.90 per GB
Pricier than about 78% 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 numberMR38400-924K16
Total capacity1 TB (16 × 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 items1 TB (16 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Does my Supermicro FatTwin SuperServer SYS-F521E3-RTB or SYS-F511E2-RT have enough DDR5 RDIMM slots for all 16 modules?

This kit contains 16 modules of 64 GB each. Your server must provide 16 free 288-pin DDR5 RDIMM slots to install the full 1 TB kit.

Can I mix these CL40 2Rx4 modules with slower or lower-rank DDR5 RDIMMs already installed?

Mixing CAS latency 40 with different latencies or mixing 2Rx4 ranks with other ranks may prevent the system from training at 4800 MT/s. Matching specifications across all populated slots is recommended.

After installation, how do I verify the kit is running at DDR5 4800 with ECC active?

Enter the BIOS or use a hardware-inventory tool and confirm the memory speed reads 4800 MT/s (PC5-38400), total capacity shows 1 TB, and ECC status reports enabled or active.

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