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Two green DDR5 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (2x32GB) DDR5 4800 CL40 ECC RDIMM Lenovo Thinkstation PX

SKU CH-ZWEF-QHYYD

Adds 64 GB of DDR5 4800 ECC registered memory in a dual 32 GB kit for Lenovo Thinkstation PX workstations

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 64 GB kit expands workstation memory capacity using two 32 GB modules
  • DDR5 4800 speed delivers high bandwidth for demanding workloads
  • ECC registered design protects data integrity in critical applications
  • 1 V operation reduces power draw under heavy load
  • Validated for Lenovo ThinkStation PX compatibility and stability

Lenovo ThinkStation PX DDR5 ECC Kit

This 64 GB kit contains two 32 GB DDR5 4800 registered ECC modules built for Lenovo ThinkStation PX workstations. Each stick runs at 1.10 V with CL40 latency and a 2Rx8 organisation. The 288-pin RDIMM form factor fits the platform's server-class memory slots.

Professionals needing registered ECC memory

Buyers who want non-ECC or unbuffered DDR5 should look elsewhere because this kit is registered and ECC-only. Systems that require a different voltage, pin count or rank configuration cannot use these modules.

Verify your ThinkStation PX supports 2Rx8

Check the motherboard manual for maximum capacity per slot and total population rules before ordering. Confirm the BIOS revision accepts this speed and rank layout to avoid compatibility issues.

How it compares

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

Price $1,764.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $27.58 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 numberMR38400-328K2
Total capacity64 GB (2 × 32 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 rank2Rx8
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items64 GB (2 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What motherboard slot does this 288-pin DDR5 RDIMM kit require?

The kit uses 288-pin DDR5 RDIMM modules that must be installed in a Lenovo Thinkstation PX workstation with matching DDR5 RDIMM slots.

Will these CL40 registered ECC modules run with any non-ECC DDR5 memory I keep installed?

No, registered ECC RDIMMs cannot be mixed with non-ECC or unbuffered DDR5; all slots must use registered ECC modules for the system to operate correctly.

How can I confirm the kit is running at the rated 4800 speed and CL40 latency after installation?

Check the memory speed and CAS latency in the system BIOS or UEFI; it should report DDR5 4800 (PC5-38400) with CL40 timings for each 32 GB module.

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