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Four green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 512GB (4 x 128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-18VY-1E0X3

A 512 GB DDR5 server kit of four 128 GB registered ECC RDIMMs running at 4800 MT/s with CL40 latency for compatible Supermicro systems

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity from four 128 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered RDIMM design protects data integrity
  • 1 V operation reduces power draw in dense configs
  • Validated for Supermicro CloudDC SuperServer SYS-621C-TN12R SYS-611C-TN4R SYS-121C-TN2R

512 GB DDR5 ECC RDIMM kit

This NEMIX RAM kit delivers 512 GB of DDR5 4800 memory in four 128 GB registered DIMMs. Each module operates at 1.1 V with CL40 latency and uses a 4Rx4 organisation. The 288-pin RDIMMs include ECC for error correction in server workloads. The kit is validated for Supermicro CloudDC SuperServer SYS-621C-TN12R, SYS-611C-TN4R and SYS-121C-TN2R systems.

Suited for Supermicro DDR5 servers needing maximum

Administrators expanding memory in the listed Supermicro CloudDC platforms can install this 512 GB kit to reach the highest supported density per channel. The registered design and ECC function maintain signal integrity and data accuracy under sustained load. Builders targeting consumer motherboards, workstations without registered DIMM support, or systems limited to lower-density modules should select a different memory type.

Four 128 GB 4Rx4 modules at DDR5 4800 CL40

The 4Rx4 rank structure on each 128 GB DIMM determines how the memory controller addresses the array and affects maximum population rules. This organisation, combined with the 4800 MT/s speed and CL40 timing, is the critical specification for compatibility with the qualified Supermicro platforms. Verifying that the server memory controller supports 4Rx4 RDIMMs at this speed ensures the kit will function as intended.

How it compares

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

Price $14,994.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $29.29 per GB
Pricier than about 83% 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 numberMR38400-744K4
Total capacity512 GB (4 × 128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB (4 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will these 4Rx4 DDR5 4800 CL40 RDIMMs run with existing DDR5 4800 modules already in my Supermicro CloudDC SYS-621C-TN12R?

Yes, they share the same DDR5 4800 speed, 1.1 V voltage, CL40 latency and 288-pin RDIMM form factor, so the memory controller will train them together at 4800 MT/s.

How do I verify the kit is running at DDR5 4800 CL40 with ECC after installation?

Enter the BIOS or use a tool like dmidecode; you should see 512 GB total, 4800 MT/s data rate, CL40 timings, 1.1 V and ECC status reported as enabled for each of the four 128 GB modules.

Does the MR38400-744K4 kit include heat spreaders or any extra cables I need to buy?

The package contains only the four 128 GB 288-pin DDR5 RDIMM modules; no heat spreaders, cables or mounting hardware are included.

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