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Green DDR5 memory module with gold edge connectors and black chips

NEMIX RAM

NEMIX RAM 64GB DDR5 4800 CL40 2Rx4 ECC RDIMM Lenovo memory upgrade

SKU CH-QT3B-R0R8X

Adds 64 GB of DDR5 4800 ECC registered memory with CL40 latency and 1.1 V operation to compatible Lenovo servers

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64GB capacity expands server memory for demanding workloads
  • DDR5 4800 speed delivers high bandwidth for data-intensive applications
  • ECC registered design detects and corrects errors for system stability
  • 2Rx4 organisation optimises density and signal integrity
  • 1V operation reduces power draw in enterprise environments

Lenovo Server Memory Upgrade

This 64GB DDR5 RDIMM is built for Lenovo ThinkSystem servers running AMD processors. It delivers registered ECC reliability for mission-critical workloads in enterprise environments. The single-module design simplifies capacity scaling on qualified platforms. IT teams specify this part when validated compatibility is required.

Thermals and Power Profile

Operating at 1.10V, the module runs at standard DDR5 voltage without a heat spreader. Registered buffering reduces electrical load on the memory controller during sustained server workloads. ECC circuitry corrects single-bit errors to maintain data integrity under continuous operation. Passive cooling is sufficient in properly ventilated chassis.

Decisive Specification: 2Rx4 Organisation

The dual-rank x4 configuration determines how the memory controller addresses this 64GB density. Systems qualified for 2Rx4 population rules will recognise the full capacity; platforms limited to single-rank or x8 organisation will not. Verify the server memory population guide before ordering.

How it compares

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

Price $1,804.99
Pricier than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $28.20 per GB
Pricier than about 79% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K1
Total capacity64 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 rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items64 GB (1 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

How do I install this 288-pin DDR5 RDIMM in a Lenovo ThinkSystem server, and what step is often missed?

Power down the server, open the chassis, align the notch on the 288-pin DDR5 RDIMM with the slot key, press firmly until the ejector tabs click, then verify the module appears at 4800 MT/s in the BIOS memory configuration — the step often missed is enabling the correct memory mode for registered ECC DIMMs in BIOS.

What maintenance or replacement will this 64 GB 2Rx4 ECC RDIMM need over its service life?

No scheduled maintenance is required; the module has no heat spreader and runs at 1.1 V, so keep server air filters clean for airflow. Replacement is only needed if ECC correctable-error counters rise sharply or the DIMM fails POST, at which point the lifetime replacement warranty applies.

What limit appears first when this CL40 DDR5-4800 RDIMM runs sustained workloads?

The CAS latency of CL40 at 4800 MT/s sets the baseline access latency; under sustained heavy load the memory controller’s thermal throttling or the 1.1 V voltage ceiling will limit further frequency scaling before the module’s own timing becomes the bottleneck.

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