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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 ECC RDIMM CL40 1.1V 288-pin memory upgrade

SKU CH-GQEJ-4HP9Z

A 64 GB DDR5 registered ECC kit of four 16 GB modules running at 4800 MT/s with CL40 latency and 1.1 V operation, validated for Supermicro SYS-221HE servers

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB total capacity from four 16 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM design protects data integrity
  • Low 1.1 V operating voltage reduces power draw
  • Validated for Supermicro IOT SuperServer 221 series

DDR5 4800 ECC RDIMM kit

This 64 GB kit contains four 16 GB DDR5 4800 registered DIMMs with ECC and a CL40 latency at 1.1 V. It is built for Supermicro IOT SuperServer SYS-221HE-FTNR, SYS-221HE-FTNRD and SYS-221HE-TNR platforms.

Registered memory for server boards

Each module is a 1Rx8 288-pin RDIMM that requires a motherboard with registered DDR5 slots and ECC support. The registered buffer reduces electrical load on the memory controller, allowing the four-module population without additional buffering hardware.

Upgrade from non-ECC or lower-capacity DDR5

The jump is worth it when the workload demands error correction and 64 GB total capacity in a four-slot configuration. It does not suit systems that accept only unbuffered UDIMMs or boards limited to lower memory speeds.

How it compares

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

Price $1,781.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $27.84 per GB
Pricier than about 78% 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 numberMR38400-618K4
Total capacity64 GB (4 × 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 items64 GB (4 × 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 does the CL40 latency affect sustained throughput in a Supermicro SYS-221HE-FTNR?

CL40 at DDR5 4800 sets the baseline cycle delay for every read or write; ECC and registered buffering add one cycle each, so sustained bandwidth is governed by the 4800 MT/s data rate and 1Rx8 organisation rather than latency alone.

What thermal behaviour should I expect from the bare modules during continuous operation?

Without a heat spreader the modules rely on chassis airflow; registered DDR5 at 1.1 V typically runs warm but within JEDEC limits when the server fans maintain spec flow across the DIMM slots.

Which motherboard feature must already be present for this kit to function?

The board must provide 288-pin DDR5 RDIMM slots with registered ECC support; the Supermicro SYS-221HE-FTNR, SYS-221HE-FTNRD and SYS-221HE-TNR platforms listed in the compatibility data meet that requirement.

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