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Green rectangular circuit board with gold edge connectors and black memory chips

NEMIX RAM

NEMIX RAM 64GB DDR4 2933MHz CL21 2Rx4 1.2V 288-pin ECC RDIMM memory upgrade

SKU CH-RDM5-AMQEX

Adds 64 GB of DDR4-2933 ECC registered memory with CL21 latency for Lenovo ThinkSystem servers

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL21
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 64GB capacity supports heavy server workloads
  • DDR4 2933MHz speed enables fast data throughput
  • CL21 latency provides responsive memory access
  • ECC registered design protects data integrity
  • 2V operation reduces power consumption

Capacity and Form Factor

This is a single 64GB DDR4 2933MHz ECC registered DIMM built on a 288-pin RDIMM PCB. It operates at 1.2V with CL21 latency and uses a 2Rx4 rank configuration for server and workstation platforms.

Who This Suits

IT professionals upgrading Lenovo ThinkSystem servers that require PC4-23400 registered ECC memory will find this module validated for that environment. Builders needing unbuffered UDIMM memory, non-ECC modules, or speeds other than 2933MHz should look at a different product.

Build Integration

The stick plugs directly into a compatible 288-pin DDR4 RDIMM slot and draws standard 1.2V power without a heat spreader. It frees the remaining memory channels for additional registered ECC modules of matching specification.

How it compares

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

Price $407.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.37 per GB
Cheaper than about 62% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR4 2933 MHz ECC RDIMM Registered Server Memory
Part numberMR23400-924K1
Total capacity64 GB
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo
In the box
Included items64 GB (1 × 64 GB) DDR4 2933 MHz PC4-23400 2Rx4 1.2 V CL21 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Does this 288-pin DDR4 RDIMM fit a Lenovo ThinkSystem that specifies part number 4X77A12186?

Yes, the module is built to match the 4X77A12186 specification for Intel-based ThinkSystem servers.

Will the 1.2 V registered ECC design work in a slot that currently holds 1.2 V registered ECC memory?

The 1.20 V registered ECC electrical profile matches the existing 1.2 V registered ECC DIMMs, so the server will train them together.

How can I confirm the 64 GB stick is recognised at 2933 MHz with CL21 timings after installation?

Check the BIOS memory information or OS tool such as dmidecode — it should show 64 GB, 2933 MT/s, CL21, 2Rx4 organisation and ECC enabled.

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