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Green bare circuit board with black memory chips gold edge connector 288 pins single module

NEMIX RAM

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

SKU CH-5EPV-FP18N

A 128 GB DDR5 4800 CL40 4Rx4 1.1 V ECC registered DIMM for Cisco servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB capacity scales memory-heavy server workloads
  • DDR5 4800 speed feeds data to multi-core CPUs
  • ECC registered design protects data integrity under load
  • 1V operation reduces power draw per module
  • Cisco-validated compatibility ensures drop-in installation

Cisco UCSX-MR128G4RE1 Compatible DDR5 RDIMM

This 128GB DDR5 4800 registered ECC module is built for Cisco server platforms that require the UCSX-MR128G4RE1 part number. It delivers 4Rx4 organisation at 1.10V with CL40 latency for enterprise workloads.

Tool-less DIMM slot installation

The 288-pin RDIMM fits standard DDR5 server slots and requires no extra cables or brackets. Common issues include mixing registered and unbuffered DIMMs or populating slots in an order the platform firmware rejects.

Suited for Cisco server memory upgrades

Ideal for administrators expanding capacity on qualified Cisco systems that specify this exact part. Not suited for consumer desktop boards, laptops or any platform that does not support registered ECC DDR5 RDIMMs.

How it compares

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

Price $4,079.99
Pricier than about 77% 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 $31.87 per GB
Pricier than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineCisco Server Compatible Series Memory
Model nameCisco 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 systemsCisco
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

Questions about this item

How can I verify the module is running at DDR5 4800 CL40 after installation?

Enter the server BIOS or use a tool such as CPU-Z to confirm the memory operates at 4800 MT/s with CAS latency 40 and 1.1 V.

What is included in the package and do I need any extra parts?

The box contains one 128 GB 288-pin DDR5 RDIMM; no additional components are required for installation.

Which capacity and rank configuration should I select for a Cisco UCS server needing registered ECC memory?

Choose this single 128 GB 4Rx4 registered ECC RDIMM to match the Cisco UCSX-MR128G4RE1 specification.

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