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Green rectangular DDR5 RDIMM module with black chips on both sides no heat spreader 288 gold pins

NEMIX RAM

NEMIX RAM 64GB DDR5 5600 ECC RDIMM 2Rx4 CL46 1.1V 288-Pin Lenovo ThinkSystem 4X77A90992 memory upgrade

SKU CH-47T8-MW1XW

64 GB DDR5 5600 ECC RDIMM CL46 1.1 V 288-pin registered memory for Lenovo ThinkSystem servers

  • Total capacity64 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL46
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64GB DDR5 capacity handles demanding server workloads
  • 5600MHz speed delivers high-bandwidth data throughput
  • ECC registered design protects data integrity under load
  • 1V operation reduces power draw in dense configurations
  • Validated for Lenovo ThinkSystem 4X77A90992 compatibility

Lenovo ThinkSystem DDR5 ECC RDIMM

This NEMIX RAM module delivers 64GB of DDR5 5600 registered ECC memory in a single 288-pin DIMM. It operates at 1.1V with CL46 latency and uses a 2Rx4 organisation built from major OEM DRAM. The part is validated for Lenovo ThinkSystem servers carrying the 4X77A90992 qualification.

Registered design for multi-DIMM server boards

The registered buffer reduces electrical load on the memory controller, allowing larger populations of DIMMs per channel without signal degradation. ECC circuitry corrects single-bit errors to maintain data integrity in mission-critical workloads. No heat spreader is fitted, so airflow in the server chassis provides all necessary cooling.

Suited for IT teams expanding Lenovo ThinkSystem

Buyers needing non-ECC unbuffered DIMMs for desktop platforms should look elsewhere, as the registered interface and ECC function are incompatible with consumer motherboards. Systems requiring lower latency or higher clock speeds than CL46 at 5600 MT/s will need a different module specification.

How it compares

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

Price $2,069.99
Pricier than about 69% 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 $32.34 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 lineLenovo Server/Workstation Compatible Series Memory
Model nameLenovo DDR5 5600 MHz ECC RDIMM Registered Server Memory
Part numberMR44800-924K1
Total capacity64 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL46
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 5600 MHz PC5-44800 2Rx4 1.1 V CL46 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 2Rx4 rank organisation and CL46 latency become the first bottleneck under sustained server workloads?

The module uses a 2Rx4 layout with CL46 timing, so rank density and latency are the primary limits during continuous heavy use.

How much heat and power does a 1.1 V DDR5 5600 RDIMM produce when running all day?

At 1.1 V the registered DIMM draws minimal power and generates low heat, aided by the DDR5 architecture’s efficient voltage regulation.

Which Lenovo ThinkSystem servers already support the 4X77A90992 part number for this 64 GB upgrade?

The 4X77A90992 designation matches Intel-based Lenovo ThinkSystem platforms qualified for this 64 GB DDR5 5600 ECC RDIMM.

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