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Sixteen green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB (16x16GB) DDR5 4800 ECC RDIMM CL40 SuperMicro SYS-221HE memory upgrade

SKU CH-5DEP-5FFY6

256GB DDR5 ECC RDIMM kit of 16x16GB at 4800MT/s CL40 1.1V for SuperMicro SYS-221HE servers

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity across 16 modules
  • DDR5 4800 speed with PC5-38400 bandwidth
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • Validated for SuperMicro SYS-221HE systems

Capacity and Configuration

This kit provides 256GB of DDR5 memory arranged as sixteen 16GB modules. It is built for administrators upgrading a SuperMicro SYS-221HE series server to its maximum supported density.

Registered ECC requirement

The modules are registered ECC RDIMMs, so they only work in platforms that accept buffered DDR5 with error correction. Desktop boards, consumer workstations or any system needing unbuffered non-ECC memory cannot use this kit.

Speed and latency

Rated at 4800 MT/s with CL40 timing at 1.1V, the kit matches the SYS-221HE memory controller specification. Installing slower or faster DDR5 will force the platform to downclock or prevent boot.

How it compares

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

Price $7,491.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $29.27 per GB
Pricier than about 83% 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 numberMR38400-618K16
Total capacity256 GB (16 × 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 items256 GB (16 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

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