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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4x64GB) DDR5 4800 ECC RDIMM CL40 1.1V SuperMicro Compatible memory upgrade

SKU CH-4GC7-2YXPH

256 GB DDR5-4800 ECC RDIMM kit of four 64 GB modules at CL40 and 1.1 V, validated for SuperMicro Hyper SuperServer 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
  • 256GB total capacity across four 64GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered design detects and corrects data errors
  • CL40 latency at 1.1V operating voltage
  • 288-pin RDIMM form factor for SuperMicro SYS-121H-TNR SYS-221H-TNR SYS-221H-TN24R

Capacity and Compatibility

This 256GB kit contains four 64GB DDR5 ECC RDIMM modules built for SuperMicro Hyper SuperServer systems including the SYS-121H-TNR, SYS-221H-TNR and SYS-221H-TN24R. It targets IT professionals who need registered, error-correcting memory for mission-critical server and workstation workloads.

Registered ECC at DDR5 4800

Each module runs at 4800MT/s (PC5-38400) with a CAS latency of CL40, 2Rx4 organisation and a 1.1V operating voltage. The registered buffer and on-die ECC protect data integrity under sustained load, making this specification the decisive factor for compatibility with the listed SuperMicro platforms.

288-pin DDR5 RDIMM form factor

The kit installs into standard 288-pin DDR5 RDIMM slots and requires a motherboard that supports registered ECC memory at the rated speed and voltage. It does not suit consumer desktop boards, unbuffered DIMM slots or systems that cannot address 64GB per module. Buyers needing non-ECC, lower-capacity or higher-speed modules should look elsewhere.

How it compares

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

Price $6,376.99
Pricier than about 82% 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 $24.91 per GB
Pricier than about 69% 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

What does the 4800 MT/s speed mean once the four 64 GB DIMMs are installed in a SuperMicro server?

The kit runs at DDR5 4800 with CL40 latency at 1.1 V, delivering the rated transfer rate across all four modules when the platform supports that speed.

How does the 288-pin DDR5 RDIMM interface and PC5-38400 rating limit real-world performance?

The registered 288-pin DDR5 form factor and PC5-38400 designation set the electrical and mechanical interface; the memory controller in the SuperMicro system determines the maximum usable throughput.

What physical space and slot arrangement do the four 2Rx4 modules need to fit in the SYS-121H-TNR, SYS-221H-TNR or SYS-221H-TN24R?

Each module is a standard 288-pin DDR5 RDIMM without a heat spreader; the four 64 GB sticks occupy four DIMM slots and require the server's memory population rules to be followed.

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