OWC 64GB DDR4 2933MHz ECC RDIMM Lenovo P520 P520c memory upgrade

64GB ECC RDIMM for Lenovo Workstations

This 64GB DDR4 2933MHz ECC Registered DIMM is built for Lenovo ThinkStation P520 and P520c systems. It targets professionals who need error-correcting memory for data integrity in workstation and server environments. The module operates at 1.2V with CL21 latency and uses a 288-pin form factor. Buyers with standard desktop PCs cannot use this registered memory.

Capacity and headroom at 2933MHz

A single 64GB module provides substantial memory headroom for virtualisation, large datasets and multi-application workflows. The PC4-23400 rating delivers 2933MHz speed while maintaining backward compatibility with 2133MHz, 2400MHz and 2666MHz platforms. Registered buffering adds a clock cycle of latency, so workloads sensitive to raw latency may see reduced benefit compared to unbuffered alternatives.

Build integration and compatibility

Installation requires a Lenovo ThinkStation P520 or P520c motherboard that supports DDR4 ECC Registered DIMMs. The module replaces Lenovo part numbers 4X70V98063, 4ZC7A08710 and 4ZC7A08744 directly. It cannot be mixed with unbuffered memory, so all slots must use registered ECC modules. No heat spreader is fitted, leaving clearance for dense CPU cooler configurations.