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Green bare circuit board with gold edge contacts and black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 CL40 1.1V 4Rx4 ECC RDIMM Dell Compatible memory upgrade

SKU CH-4B6Y-7R4K8

A 128 GB DDR5 4800 CL40 1.1 V ECC registered DIMM built for Dell servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB capacity supports heavy virtualization and database workloads
  • DDR5 4800 speed delivers high bandwidth for compute-intensive tasks
  • ECC registered design detects and corrects data errors for server reliability
  • 1V operation reduces power draw in dense memory configurations
  • Dell-compatible 288-pin RDIMM ensures validated fit in supported systems

128GB DDR5 4800 ECC RDIMM

This is a 128GB DDR5 4800 registered ECC memory module built for Dell servers and workstations. It runs at PC5-38400 speed with CL40 latency and 1.10V voltage. The single 288-pin RDIMM uses a 4Rx4 organisation and major OEM chips for enterprise workloads.

Suited for Dell systems needing maximum registered

It fits administrators expanding memory in compatible Dell platforms that support 128GB RDIMMs at 4800MT/s. Buyers needing unbuffered UDIMMs, non-ECC modules, lower capacities, or different form factors such as SODIMM should look at other products.

Verify your Dell model accepts 128GB 4Rx4 DDR5

Check the system documentation or Dell part numbers SNPMMWR9C/128G and AC517142 to confirm 4800MHz registered ECC support. Ensure the motherboard has free 288-pin DDR5 slots and that the BIOS recognises 4Rx4 modules at this density.

How it compares

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

Price $3,558.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.80 per GB
Pricier than about 78% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K1
Total capacity128 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 systemsDell
In the box
Included items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

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