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Green circuit board with gold edge connector and black memory chips

OWC

OWC 16GB DDR5 4800 CL40 ECC Registered RDIMM ThinkStation P5

SKU CH-BQ24-0MN7S

A 16 GB DDR5 4800 CL40 ECC registered RDIMM for the Lenovo ThinkStation P5 workstation

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

Capacity 16GB

  • 16 GB DDR5 ECC registered memory for ThinkStation P5
  • 4800 MT/s CL40 speed with 1.1 V operation
  • Single-rank 1Rx8 288-pin RDIMM module
  • Replaces Lenovo part numbers 4X71L72498 4X77A77029 4X77A81437
  • JEDEC and RoHS compliant for reliable server-grade upgrades

System-specific DDR5 ECC RDIMM for ThinkStation P5

This 16 GB DDR5 module runs at 4800 MT/s with CL40 latency and 1.1 V operation. It is an ECC Registered DIMM designed for Lenovo ThinkStation P5 workstations and compatible server platforms. The single-rank 1Rx8 layout fits standard 288-pin slots. It is not compatible with standard desktop motherboards or unbuffered memory configurations.

Installation and mixing constraints

The module installs like any 288-pin DIMM but requires a platform that supports ECC Registered memory. Mixing with unbuffered or load-reduced ECC modules will prevent boot or cause instability. No heat spreader is fitted, so airflow across the sticks must be adequate. Handle only by the edges to avoid contaminating the gold contacts.

Pre-order compatibility checks

Confirm your ThinkStation P5 service manual lists part numbers 4X71L72498, 4X77A77029 or 4X77A81437 as approved upgrades. Verify the system BIOS is current enough to recognise DDR5 4800 Registered DIMMs. Ensure all populated slots use identical ECC Registered modules of the same rank and speed. Do not order if your workstation uses unbuffered or consumer DDR5 memory.

Highlights

  • 16 GB DDR5 ECC registered memory for ThinkStation P5
  • 4800 MT/s CL40 speed with 1.1 V operation
  • Single-rank 1Rx8 288-pin RDIMM module
  • Replaces Lenovo part numbers 4X71L72498 4X77A77029 4X77A81437
  • JEDEC and RoHS compliant for reliable server-grade upgrades

Specifications

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 P5

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Questions about this item

How can I verify the 16GB DDR5 4800 CL40 ECC Registered RDIMM is detected correctly in my ThinkStation P5?

After installation, enter the BIOS or UEFI firmware and confirm the memory shows 16GB at 4800 MT/s with ECC Registered status. The operating system should report the full capacity without errors.

What is included with the OWC 4R8D51R816GB module and what must be purchased separately?

The package contains one 16GB 288-pin DDR5 ECC Registered RDIMM rated at 1.1V. No cables, brackets or additional modules are supplied; buy extra DIMMs only if you need more capacity.

Which Lenovo part numbers does this 1Rx8 DDR5 4800 module replace?

This OWC module replaces Lenovo part numbers 4X71L72498, 4X77A77029 and 4X77A81437 for the ThinkStation P5.

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