Add capacity where it counts with 16 GB of DDR4-2666 Registered ECC memory built for enterprise server environments. This AddOn Networks module is a compatible, factory-original replacement for HP P00922-B21 systems, making it a practical choice when you need to restore or expand memory without introducing compatibility risk. The 2,666 MHz data rate supports mainstream server workloads, while Registered ECC architecture helps guard against memory errors that can affect uptime and data integrity. That combination makes this module well suited for production servers where stability matters more than headline specs. Use it to replace failed DIMMs, complete matched memory configurations, or raise the ceiling on smaller virtualization hosts and application servers. For procurement teams, it offers a straightforward way to source a verified compatible part that aligns with enterprise maintenance standards and avoids the uncertainty of generic alternatives.