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Two green DDR5 RDIMM modules with gold contacts and black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR5 4800 CL40 ECC RDIMM SuperMicro FatTwin Compatible memory upgrade

SKU CH-JD1Z-K6VPB

Dual-channel 32 GB DDR5-4800 ECC RDIMM kit built for SuperMicro FatTwin SuperServers

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 32 GB DDR5 ECC RDIMM kit for SuperMicro FatTwin servers
  • Registered DDR5 4800 CL40 at 1.1 V for stable throughput
  • Two 16 GB 1Rx8 modules populate dual-channel slots
  • OEM-grade Samsung, Micron or Hynix chips validated under load
  • 288-pin DDR5 form factor fits SuperMicro SYS-F521E3-RTB and SYS-F511E2-RT

SuperMicro FatTwin DDR5 Kit

This 32 GB kit contains two 16 GB DDR5 modules rated at 4800 MT/s with CL40 latency and ECC registered operation. It targets IT teams upgrading SuperMicro FatTwin SuperServer models such as SYS-F521E3-RTB, SYS-F511E2-RT and X13SEFR-A.

Tool-free DIMM installation

Modules slot into the 288-pin RDIMM sockets without tools; the registered buffer adds a small electrical load that the platform expects. Errors usually come from mixing ranks or skipping the vendor BIOS update that enables DDR5 4800 on these chassis.

Steady 1.10 V under load

Samsung, Micron or Hynix ICs maintain the rated 4800 speed during sustained server workloads because the registered design and on-die ECC correct errors before they accumulate. No heat spreader is fitted, so chassis airflow must handle the thermal load.

How it compares

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

Price $921.99
Pricier than about 60% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $28.81 per GB
Pricier than about 81% 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 numberMR38400-618K2
Total capacity32 GB (2 × 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 items32 GB (2 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I verify the DDR5 4800 CL40 ECC RDIMM kit is running correctly after installation?

Enter the server BIOS or UEFI and confirm the memory speed reads 4800 MT/s, CAS latency shows CL40, voltage is 1.10 V, and ECC is reported as active for the full 32 GB capacity.

What comes in the box and do I need anything else to install this 288-pin RDIMM kit?

The box contains two 16 GB DDR5 4800 CL40 1Rx8 ECC registered RDIMM modules (part MR38400-618K2). No extra cables, brackets or heat spreaders are required for installation.

Which capacity kit should I choose for a SuperMicro FatTwin system needing 32 GB total?

Select this 32 GB kit (2 × 16 GB) to populate two slots with matched 1Rx8 modules, delivering the full 32 GB at DDR5 4800 CL40 with ECC registered operation.

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