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Green DDR5 RDIMM circuit board with gold contacts and black memory chips

NEMIX RAM

NEMIX RAM 64GB DDR5 4800 CL40 2Rx4 1.1V ECC RDIMM SuperMicro SYS-221HE memory upgrade

SKU CH-64S5-FW3CY

64GB DDR5 4800 CL40 2Rx4 1.1V ECC RDIMM for SuperMicro SYS-221HE servers

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB capacity expands server memory headroom
  • DDR5 4800 speed delivers high bandwidth for demanding workloads
  • ECC registered design corrects errors to protect data integrity
  • 1 V operation reduces power draw in dense configurations
  • Validated for SuperMicro SYS-221HE systems ensures drop-in compatibility

System-specific DDR5 ECC RDIMM

This 64GB DDR5 4800 CL40 module is built for the SuperMicro SYS-221HE SuperServer series. It uses a registered 2Rx4 layout at 1.1V with on-die ECC for data integrity in continuous server workloads. The 288-pin form factor matches the platform's memory slots exactly.

Suited for capacity upgrades in validated

Administrators expanding memory in SYS-221HE-FTNR, SYS-221HE-FTNRD or SYS-221HE-TNR chassis can install this single stick without mixing ranks. Builders targeting consumer desktops, unregistered DIMM platforms or systems that require heat spreaders should select different memory.

Registered 2Rx4 organisation at 4800 MT/s

The dual-rank by four architecture delivers 64GB per slot while the registered buffer reduces electrical load on the memory controller. This combination of rank structure, speed and ECC registration determines whether the module posts correctly in the qualified SuperMicro platform.

How it compares

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

Price $1,679.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $26.25 per GB
Pricier than about 72% 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 numberMR38400-924K1
Total capacity64 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 items64 GB (1 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 288-pin DDR5 RDIMM fit the memory slots in my SuperMicro SYS-221HE server?

Yes, this module uses the standard 288-pin DDR5 RDIMM form factor designed for the SuperMicro SYS-221HE-FTNR, SYS-221HE-FTNRD and SYS-221HE-TNR systems.

Do I need to configure anything in the BIOS after inserting the registered ECC module, or is it plug-and-play?

The module runs at 1.1V with CL40 timing at 4800 MT/s; most SuperMicro platforms detect these settings automatically, but you should still verify the memory training completes on first boot.

Since there is no heat spreader, will the Samsung, Micron or Hynix chips need active airflow to stay within safe temperatures?

Registered DDR5 DIMMs are rated for 1.10V operation without a spreader; ensure your server chassis provides the normal front-to-back airflow across the DIMM slots.

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