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Sixteen green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 512GB (16x32GB) DDR5 4800 CL40 1Rx4 ECC RDIMM SuperMicro 221HE memory upgrade

SKU CH-1A2Y-G3AKM

A 512GB DDR5 4800 CL40 ECC RDIMM kit of 16×32GB 1Rx4 modules at 1.1V for SuperMicro 221HE servers

  • Total capacity512 GB (16 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • Massive 512GB capacity from 16 modules of 32GB each
  • DDR5 4800 speed rated at PC5-38400 for high throughput
  • ECC registered RDIMM design protects data integrity in servers
  • Low 1.10V operation reduces power draw per module
  • Validated for SuperMicro 221HE systems ensuring compatibility

Capacity and compatibility

This 512 GB kit contains sixteen 32 GB DDR5 4800 CL40 registered DIMMs built for Supermicro SuperServer SYS-221HE models. IT teams expanding memory in those specific 1U platforms use this exact part number for validated operation.

Thermals and power

Modules run at 1.10 V without heat spreaders, relying on the server’s directed airflow for cooling. Registered buffering and ECC add minimal overhead while maintaining signal integrity across all sixteen slots under sustained load.

Included kit

The package delivers the full 512 GB as a matched sixteen-module set, eliminating the need to source individual sticks or verify rank consistency manually. Each DIMM is stress-tested before shipping to reduce the chance of a single faulty module destabilising the array.

How it compares

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

Price $14,664.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (16 × 32 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $28.64 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 numberMR38400-314K16
Total capacity512 GB (16 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB (16 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How do I install the 16 DDR5 RDIMM modules in my SuperMicro 221HE server, and which step is most often missed?

Power down, open the chassis, and seat each 288‑pin module until the latches click; the step most often missed is confirming every module registers in the BIOS before closing the case.

What maintenance or replacement will the 512GB kit need over its service life?

No scheduled maintenance is required; if a module fails the lifetime replacement covers it, otherwise the kit runs until you upgrade capacity or speed.

What limit appears first when the 1Rx4 ECC RDIMMs run sustained workloads at 4800 MT/s?

The CL40 latency at 1.10 V is the first bottleneck; throughput scales with load but response time cannot improve beyond the rated timing.

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