OWC 256GB (4×64GB) DDR4 3200 CL22 2Rx4 288-pin 1.2V ECC Registered RDIMM Cisco UCS C4200 memory upgrade

Server-specific DDR4 kit

This 256GB kit contains four 64GB DDR4 3200 registered ECC RDIMMs built for the Cisco UCS C4200. It targets administrators who need to expand memory capacity in that exact server platform. The modules operate at 1.2V with CL22 latency and a 2Rx4 organisation. They will not work in standard desktop computers or alongside unbuffered or load-reduced DIMMs.

Registered ECC 288-pin form factor

Each stick uses the 288-pin RDIMM interface with on-board register and ECC circuitry for error correction in mission-critical workloads. No heat spreader is fitted, so airflow in the Cisco chassis must handle thermal management. The registered design adds one clock cycle of buffering, which the C4200 memory controller expects for stable operation at full population.

DDR4 3200 platform ceiling

The PC4-25600 rating sets the maximum transfer rate for this generation; faster DDR4 speeds are not supported by the C4200 memory subsystem. Mixing these registered modules with unbuffered or LRDIMM types will prevent the system from posting. Capacity scaling beyond 256GB depends on the server’s DIMM slot count and qualified vendor list, which are not covered by this kit.