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Four green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR5 4800 ECC RDIMM CloudDC SYS-621C-TN12R SYS-611C-TN4R SYS-121C-TN2R memory upgrade

SKU CH-K6CX-WRTN7

128 GB DDR5 4800 ECC registered server kit with four 32 GB modules for Supermicro CloudDC systems

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity across four 32 GB modules expands server memory for heavy workloads
  • DDR5 4800 speed with PC5-38400 bandwidth delivers high throughput for data-intensive tasks
  • ECC registered RDIMM design corrects errors and stabilises mission-critical systems
  • 1 V operating voltage reduces power draw in dense Supermicro CloudDC configurations
  • Validated for SYS-621C-TN12R SYS-611C-TN4R SYS-121C-TN2R ensures drop-in compatibility

128GB DDR5-4800 ECC RDIMM kit for SuperMicro CloudDC

This registered DDR5 memory kit delivers 128GB across four 32GB modules rated at 4800MT/s with CL40 latency and 1.1V operation. It targets IT teams upgrading SuperMicro CloudDC SYS-621C-TN12R, SYS-611C-TN4R or SYS-121C-TN2R servers where ECC integrity and registered signalling are required.

Verify DDR5 RDIMM slots and population rules

Confirm the server has four free 288-pin DDR5 RDIMM slots and that the platform supports 1Rx4 registered modules at 4800MT/s. Check the system manual for approved population order and maximum capacity per channel before installing this 128GB configuration.

Matched quad-kit removes mixed-module risk

The four modules are factory matched and stress tested together, so timing, voltage and rank behaviour stay identical across all slots. This eliminates the instability that can appear when mixing individual sticks of the same nominal specification.

How it compares

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

Price $3,900.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $30.48 per GB
Pricier than about 87% 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 numberMR38400-314K4
Total capacity128 GB (4 × 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 items128 GB (4 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 128GB kit ship as four 32GB modules or do I need to buy extra sticks?

The kit contains four 32GB DDR5 4800 ECC RDIMM modules giving 128GB total; no additional sticks are required.

Should I pick this 4800MT/s CL40 kit or a different speed for my Supermicro CloudDC server?

This 4800MT/s CL40 registered ECC kit matches the qualified speed for the SYS-621C-TN12R, SYS-611C-TN4R and SYS-121C-TN2R platforms.

What does the 4800MT/s rating deliver once installed in a real Supermicro CloudDC system?

The modules run at 4800MT/s with CL40 latency at 1.1V, providing registered ECC bandwidth of PC5-38400 across the four 288-pin slots.

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