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Green DDR5 RDIMM circuit board with black memory chips, no heat spreader, 288 gold edge contacts

NEMIX RAM

NEMIX RAM 128GB DDR5 4800 ECC RDIMM CL40 1.1V Lenovo Thinkstation PX

SKU CH-TDB4-DZT52

128 GB DDR5 4800 ECC registered RDIMM at CL40 and 1.1 V, built for Lenovo ThinkStation PX workstations

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128GB capacity supports demanding workloads
  • DDR5 4800 speed enables fast data throughput
  • ECC registered design protects data integrity
  • 1V operation reduces power consumption
  • Validated for Lenovo ThinkStation PX compatibility

Lenovo Thinkstation PX DDR5 RDIMM

This 128 GB registered ECC module is built for the Lenovo Thinkstation PX workstation line. It targets IT professionals and system builders who need maximum single-slot capacity with error correction for mission-critical workloads.

Single module fills one slot at full density

The 1x128 GB layout delivers the full 128 GB in a single 288-pin RDIMM. ECC and registered buffering protect data integrity under sustained load. CL40 timing at 4800 MT/s and 1.10 V operation match the platform's qualified specification.

Verify DDR5 RDIMM support and slot population rules

Confirm the workstation accepts DDR5 registered ECC RDIMMs and check the memory population guide for rank limits per channel. The 4Rx4 organisation may restrict how many modules can be installed per processor.

How it compares

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

Price $3,604.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $28.16 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 numberMR38400-744K1
Total capacity128 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 rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo
In the box
Included items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Will the 128GB DDR5 4800 ECC RDIMM module need a heat spreader added later for sustained loads?

The module ships without a heat spreader; server chassis airflow is designed to cool bare DDR5 RDIMMs at 1.1 V under continuous operation.

What limits sustained throughput first on this 4Rx4 registered DDR5 4800 stick?

The CL40 CAS latency and 4800 MT/s data rate set the bandwidth ceiling before the 1.10 V power envelope becomes a bottleneck.

How much extra heat and power does the 128GB ECC RDIMM add when the ThinkStation PX runs all day?

At 1.1 V the module draws minimal power, and registered DDR5 architecture keeps thermal output low enough for standard workstation cooling.

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