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
Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 128GB (8x16GB) DDR5 4800 CL40 1.1V ECC RDIMM SuperMicro FatTwin memory upgrade

SKU CH-32BH-FZBJ3

Eight 16 GB DDR5 RDIMMs deliver 128 GB of ECC registered memory at 4800 MT/s for SuperMicro FatTwin servers

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB total capacity across eight 16GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered RDIMM ensures data integrity under load
  • 1V operation reduces power draw in dense configurations
  • Validated for SuperMicro FatTwin SYS-F521E3-RTB and SYS-F511E2-RT systems

SuperMicro FatTwin DDR5 upgrade

This 128 GB kit contains eight 16 GB DDR5 4800 registered ECC RDIMMs built for SuperMicro FatTwin SuperServer models SYS-F521E3-RTB, SYS-F511E2-RT and X13SEFR-A. It targets administrators who need maximum supported capacity in those specific platforms.

Registered ECC modules for dense servers

Each 288-pin module runs at 1.10 V with CL40 latency and a 1Rx8 organisation, so the memory controller handles the buffering and error correction required by multi-socket FatTwin nodes. The kit occupies eight DIMM slots and leaves no unbuffered or non-ECC alternatives in those channels.

Eight matched sticks in one package

The box delivers all 128 GB as a single validated kit, removing the risk of mixing revision codes or rank configurations across a FatTwin chassis. No heat spreaders are included, so airflow must follow the server manufacturer’s ducting design.

How it compares

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

Price $3,377.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $26.39 per GB
Pricier than about 73% 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 lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-618K8
Total capacity128 GB (8 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items128 GB (8 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What is the CAS latency of these DDR5 4800 modules under sustained load?

The modules run at CL40, which is the rated latency for the DDR5 4800 specification used in this kit.

How much power and heat do the 1.1 V registered DIMMs generate when running all day?

Each DIMM operates at 1.10 V without a heat spreader, so power draw and thermal output stay at the standard DDR5 4800 registered level.

Which Supermicro FatTwin chassis and motherboards must already be installed for this 8×16 GB kit to work?

The kit is validated for Supermicro FatTwin SuperServer SYS-F521E3-RTB, SYS-F511E2-RT and X13SEFR-A platforms.

More in Model-Specific Memory Upgrades

Similar items