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Four green DDR5 RDIMM modules with gold contacts and black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR5 4800 ECC RDIMM CL40 1.1V Lenovo ThinkStation PX Series memory upgrade

SKU CH-NKSQ-8XTV3

64 GB DDR5-4800 ECC registered RDIMM kit for Lenovo ThinkStation PX workstations

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB total capacity from four 16 GB modules
  • DDR5 4800 speed for high-throughput workloads
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • Validated for Lenovo ThinkStation PX workstations

Lenovo ThinkStation PX memory kit

This 64GB kit contains four 16GB DDR5 RDIMM modules built for Lenovo ThinkStation PX workstations. Registered ECC operation detects and corrects single-bit errors to protect data integrity in professional workloads. Each module runs at 4800 MT/s with a CL40 latency at 1.1V.

Thermals and power at 1.1V

Low 1.1V operating voltage reduces power draw per module during sustained compute tasks. Bare modules without heat spreaders rely on chassis airflow for cooling in the workstation's directed thermal zones. Registered buffering adds minimal latency while stabilising the memory bus under full population.

What the kit changes

Four matched 1Rx8 modules fill four slots in a single upgrade, delivering 64GB of registered ECC capacity immediately. Samsung, Micron or Hynix DRAM chips are validated for compatibility with the ThinkStation PX platform. No additional software or accessories are included in the package.

How it compares

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

Price $1,747.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $27.31 per GB
Pricier than about 76% 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 numberMR38400-618K4
Total capacity64 GB (4 × 16 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 rank1Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items64 GB (4 × 16 GB) DDR5 4800 MHz PC5-38400 1Rx8 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the 288-pin DDR5 RDIMM modules in my ThinkStation PX, and what step is often missed?

Power down, open the chassis, align the notch on each 288-pin module with the slot key, press firmly until both retention clips click, then verify in BIOS that all four 16 GB modules show at 4800 MHz — the step often missed is seating every module fully so both clips engage.

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

No routine maintenance is required; the modules have no heat spreader and run at 1.1 V, so keep the workstation's air filters clean and ensure airflow remains unobstructed — if a module ever fails, replace it with an identical 1Rx8 CL40 DDR5 4800 ECC RDIMM to preserve matched ranks.

What limit appears first when this memory runs sustained workloads at 4800 MHz?

The primary limit is the CL40 latency at 1.1 V; under continuous heavy load the CAS latency and fixed voltage define the maximum stable throughput before timing errors or thermal throttling occur.

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