OWC 16GB DDR5 4800 CL40 ECC Registered RDIMM ThinkStation P5

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.