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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 256GB (8x32GB) DDR5 4800 CL40 1.1V ECC RDIMM memory upgrade

SKU CH-B4NF-XX3QK

Eight 32 GB DDR5 modules deliver 256 GB of registered ECC memory at 4800 MT/s with CL40 latency for Supermicro FatTwin and SuperServer systems

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB kit (8 × 32 GB) maximises server capacity
  • DDR5 4800 MT/s (PC5-38400) delivers high throughput
  • ECC registered RDIMM protects data integrity
  • 10 V operation reduces power draw
  • Validated for Supermicro FatTwin SYS-F521E3-RTB and SYS-F511E2-RT

Compatible SuperMicro Server Memory Kit

This 256GB kit contains eight 32GB DDR5 RDIMM modules built for SuperMicro FatTwin and SuperServer systems including SYS-F521E3-RTB, SYS-F511E2-RT and X13SEFR-A. ECC registered operation protects data integrity in mission-critical workloads.

Registered 288-Pin Design Without Heat Spreaders

Each module uses a 288-pin DDR5 RDIMM form factor with 1Rx4 organisation and no heat spreader, allowing dense population in 1U and 2U chassis where vertical clearance is tight. Registered buffering reduces electrical load on the memory controller for stable operation at full capacity.

Low-Voltage DDR5 At 4800 MT/s CL40

The kit runs at 1.10V with a CAS latency of 40, delivering PC5-38400 bandwidth while keeping power draw and thermals modest in typical server deployments. ECC correction and registered signalling maintain reliability under sustained load without active cooling on the modules themselves.

How it compares

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

Price $7,034.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $27.48 per GB
Pricier than about 77% 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 numberMR38400-314K8
Total capacity256 GB (8 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items256 GB (8 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What DDR5 speed does this kit run at and what bandwidth does that provide?

The modules operate at DDR5 4800, delivering PC5-38400 bandwidth for server workloads.

What physical slot and pin count do these 288-pin RDIMMs require?

They fit standard 288-pin DDR5 RDIMM slots on Supermicro FatTwin and SuperServer boards.

How should the eight 32GB modules be populated across the channels?

Install one 1Rx4 RDIMM per channel following the motherboard manual to achieve 256GB total capacity.

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