OWC 128GB DDR5 5600 CL46 4Rx4 1.1V ECC Registered RDIMM memory upgrade

Targeted Server Memory Upgrade

This OWC module delivers 128GB of DDR5 ECC Registered memory built for Supermicro SuperServer SYS-221HE-TNR, SYS-221HE-TNRD, SYS-221H-TN24R and SYS-221H-TNR platforms. It operates at 5600 MT/s with CL46 latency at 1.1V. The 4Rx4 288-pin RDIMM form factor fits the validated server slots directly. It is designed for workstations, NAS systems, servers and network switches requiring registered ECC reliability.

Replaces Lower-Capacity Registered DIMMs

The single 128GB stick consolidates what previously required multiple lower-density registered modules, freeing slots for future expansion. The upgrade is worth it when the workload demands maximum per-slot density without mixing registered and unbuffered or load-reduced types. JEDEC and RoHS compliance ensures the change is warranty-safe for the listed Supermicro systems.

Capacity Headroom For Heavy Workloads

One module provides 128GB of error-correcting capacity, letting the server hold larger datasets and more virtual machines simultaneously. The registered buffer and ECC maintain stability under sustained load. Headroom ends when the platform’s maximum supported memory per channel or total socket limit is reached, or when an application requires unbuffered or load-reduced memory types that this registered module cannot satisfy.