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Eight green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 128GB 8x16GB DDR5 4800 CL40 ECC RDIMM SuperMicro 211SE 31AS X31SEED-SF memory upgrade

SKU CH-HK5Q-FRA5R

128 GB registered DDR5 kit with eight 16 GB ECC modules at 4800 MT/s CL40 for SuperMicro 211SE and X31SEED-SF servers

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB kit scales multi-threaded workloads across eight 16 GB modules
  • DDR5 4800 speed feeds data to SuperMicro 211SE and 31AS platforms
  • ECC registered design corrects single-bit errors for mission-critical uptime
  • CL40 latency at 1.1 V balances throughput with power efficiency
  • 288-pin 1Rx8 layout drops into X31SEED-SF slots without extra configuration

SuperMicro DDR5 4800 ECC RDIMM kit

This 128GB kit contains eight 16GB registered DDR5 modules rated at 4800 MT/s with CL40 latency and 1.10V operation. It is built for SuperMicro IoT SuperServer SYS-211SE and X31SEED-SF platforms that require ECC RDIMM memory.

Thermals and power profile

Each module runs at the standard DDR5 voltage of 1.10V without a heat spreader, relying on server chassis airflow for cooling. Registered buffering and ECC add minimal overhead while maintaining signal integrity under sustained loads.

What the kit changes

The eight-module population fills all channels on compatible SuperMicro boards, enabling maximum registered ECC capacity for virtualization and database workloads. Builders needing non-ECC UDIMMs or higher frequencies cannot use this kit.

How it compares

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

Price $3,467.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.09 per GB
Pricier than about 75% 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 numberMR38400-618K8
Total capacity128 GB (8 × 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 items128 GB (8 × 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 do I install the 8x16GB DDR5 RDIMMs in my SuperMicro SYS-211SE server, and which step is most often missed?

Power down, open the chassis, align each 288-pin module with the slot key and press firmly until both latches click; the step most often missed is seating all eight modules before the first boot so the memory controller trains the full 128GB at DDR5 4800.

What maintenance or replacement will this ECC RDIMM kit need over its service life?

No scheduled maintenance is required; if a module fails the ECC logic will flag correctable errors, and the faulty 16GB stick can be replaced individually while the remaining seven continue operating at CL40 1.10V.

What limit appears first when the 1Rx8 registered modules run sustained workloads at 4800 MT/s?

The registered buffer and on-die ECC add latency, so the CL40 timing ceiling is reached before thermal throttling on these heat-spreader-less modules.

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