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Green rectangular DDR5 RDIMM circuit board with black chips and gold edge connector

OWC

OWC 16GB DDR5 4800 ECC Registered RDIMM 1Rx8 CL40 1.1V 288-pin ThinkStation P7 PX

SKU CH-J4HP-MKFXX

16GB DDR5 4800 ECC registered RDIMM for Lenovo ThinkStation P7 and PX workstations

  • Capacity16GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 16GB

  • 16 GB DDR5 ECC RDIMM for ThinkStation P7 and PX
  • Registered design with ECC for data integrity in workstations
  • 4800 MT/s CL40 at 1.1 V for efficient performance
  • Single-rank 1Rx8 288-pin module for straightforward upgrades
  • Replaces Lenovo parts 4X71L72498, 4X77A77029, 4X77A81437

Target Workstation Memory

This 16 GB DDR5 4800 ECC Registered RDIMM is built for Lenovo ThinkStation P7 and PX workstations. The module operates at 1.1 V with CL40 latency and a 1Rx8 organisation. It is designed for professional workloads that require error-correcting registered memory.

Registered ECC Changes Compatibility

The registered ECC design means this module will not work in standard desktop PCs or consumer motherboards. It also cannot be mixed with unbuffered or load-reduced ECC memory in the same system. Buyers must confirm their workstation specifically supports registered DIMMs before ordering.

Verify Slot And Population Rules

Check the ThinkStation service manual for supported DIMM populations and maximum capacity per channel. Ensure all installed modules match the 288-pin DDR5 RDIMM form factor and registered ECC type. Mixing different ranks or speeds can prevent the system from booting.

Points forts

  • 16 GB DDR5 ECC RDIMM for ThinkStation P7 and PX
  • Registered design with ECC for data integrity in workstations
  • 4800 MT/s CL40 at 1.1 V for efficient performance
  • Single-rank 1Rx8 288-pin module for straightforward upgrades
  • Replaces Lenovo parts 4X71L72498, 4X77A77029, 4X77A81437

Caractéristiques

BrandOWC
Part Number4R8D51R816GB
Capacity16GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkStation P7
Lenovo ThinkStation PX

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Questions sur cet article

Will the ECC Registered RDIMM design require any firmware updates on the ThinkStation P7 or PX before installation?

The module follows JEDEC DDR5 4800 specifications and replaces Lenovo part numbers 4X71L72498, 4X77A77029 and 4X77A81437, so it installs without additional firmware steps on the listed workstations.

At 4800 MT/s CL40, does the CAS latency become the first bottleneck during sustained memory-heavy workloads?

CL40 is the rated latency for this DDR5 4800 module; under continuous load the registered buffer and ECC correction add fixed overhead, making latency the limiting factor before bandwidth saturates.

With no heat spreader and 1.1 V operation, how much does the module’s temperature rise during all-day compute tasks?

The bare DRAM runs at the standard 1.1 V DDR5 voltage; without a spreader it relies on chassis airflow, so case cooling capacity determines the actual temperature rise in 24/7 operation.

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