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Two green DDR5 RDIMM modules, bare circuit boards with gold contacts, no heat spreaders

NEMIX RAM

NEMIX RAM 128GB 2x64GB DDR5 4800 CL40 ECC RDIMM Lenovo Thinkstation PX Series memory upgrade

SKU CH-A9JQ-W410A

128 GB DDR5 ECC registered memory kit with two 64 GB modules at 4800 MT/s CL40 for Lenovo Thinkstation PX workstations

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB total capacity for demanding workloads with 2x64GB modules
  • DDR5 4800 speed delivers high bandwidth at PC5-38400 rating
  • ECC registered design protects data integrity in critical tasks
  • 10V operation reduces power draw per module
  • Validated for Lenovo Thinkstation PX Series compatibility

Lenovo Thinkstation PX DDR5 ECC RDIMM kit

This 128 GB kit comprises two 64 GB DDR5 4800 registered DIMMs built for Lenovo Thinkstation PX workstations. ECC and registered operation protect data integrity in professional workloads. The modules run at 1.1 V with CL40 latency and use a 288-pin form factor.

Sustained-load behaviour

Registered buffering and on-die ECC maintain stability during extended compute tasks such as rendering, simulation or database work. The 2Rx4 organisation spreads accesses across ranks to reduce contention. Modules are stress-tested under load before shipping to verify reliability.

Thermals and power

Operating at 1.1 V keeps power draw modest for high-capacity DDR5. No heat spreaders are fitted, so airflow across the bare PCB is the primary cooling path. Typical workstation chassis airflow is sufficient for normal operation.

How it compares

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

Price $3,515.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.47 per GB
Pricier than about 77% 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 numberMR38400-924K2
Total capacity128 GB (2 × 64 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 items128 GB (2 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What is the power draw of the 1.1 V DDR5 4800 ECC RDIMM kit during continuous all-day workloads?

Each module runs at 1.10 V; total system power depends on the workstation's memory controller and the number of populated slots.

What must the workstation provide for the 288-pin DDR5 RDIMM kit to function?

A Lenovo Thinkstation PX Series motherboard with DDR5 RDIMM slots that support ECC registered memory at 4800 MT/s.

Will the CL40 4800 MT/s registered ECC modules run alongside other DDR5 RDIMMs I keep in the same machine?

Mixing is possible only if the other DIMMs are also DDR5 ECC registered modules qualified for the same platform; the system will operate at the lowest common speed and timing.

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