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Four green DDR5 RDIMM sticks, no heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-XEJG-P4KHQ

256 GB DDR5 registered ECC server memory kit with four 64 GB modules at 4800 MT/s, CL40, 1.10 V, for Supermicro 221HE systems

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high bandwidth
  • ECC registered RDIMM design protects data integrity in servers
  • CL40 latency at 1.10 V for stable operation
  • Validated for SuperMicro SuperServer SYS-221HE series systems

256GB DDR5 ECC RDIMM kit

This 256GB kit contains four 64GB registered DDR5 modules built for Supermicro servers. ECC and registered operation protect data integrity in continuous workloads. The kit runs at 4800MHz with CL40 latency at 1.1V.

Suited for Supermicro IOT SuperServer 221HE-FTNR

These modules are validated for the listed Supermicro systems. Builders targeting other platforms or needing unbuffered memory should verify compatibility before purchase. Workstations requiring non-ECC consumer RAM will not use this kit.

4800MHz CL40 registered DDR5 speed

The kit operates at DDR5 4800 (PC5-38400) with CL40 timing and 2Rx4 organisation. Systems that demand a different data rate or latency profile will not match this specification.

How it compares

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

Price $7,266.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $28.39 per GB
Pricier than about 80% 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 numberMR38400-924K4
Total capacity256 GB (4 × 64 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 items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will the 288-pin DDR5 RDIMM modules fit the memory slots on my SuperMicro SYS-221HE-FTNR?

Yes, the kit uses the standard 288-pin DDR5 RDIMM form factor that matches the registered DIMM slots on the SuperMicro SYS-221HE-FTNR and related models.

What is the correct order for populating the four 64GB modules during installation?

Follow the motherboard manual's channel population sequence — typically fill the first slot of each channel before adding the second, ensuring the registered ECC modules are seated fully until the retention clips click.

How do I know when a 64GB 2Rx4 module needs replacement?

Monitor system logs for corrected ECC errors; a rising count or uncorrectable errors on a specific 64GB module indicates it should be swapped out.

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