HPE 672633R-B21 16 GB DDR3 1600 MHz CL11 ECC registered DIMM

Server memory upgrade

This HPE 672633R-B21 module adds 16 GB of DDR3 capacity to compatible ProLiant systems. It targets administrators who need to expand memory in existing DDR3 platforms without replacing the motherboard. The registered design and ECC support suit workloads that demand data integrity over raw speed. Buyers seeking consumer desktop memory or non-ECC modules should look elsewhere.

Sustained load behaviour

Registered signalling and ECC correction keep data paths stable during continuous read and write cycles. Dual-rank organisation allows the memory controller to interleave accesses across ranks, reducing bottlenecks in multi-threaded server workloads. CL11 latency at 1600 MHz delivers predictable timing for virtualisation hosts and database buffers. The module is not intended for overclocking or low-latency gaming scenarios.

Deciding specification

The 240-pin DDR3 DIMM form factor and PC3-12800 rating determine whether this part fits the target server. Only systems that accept registered ECC DDR3 at 1600 MHz can use this module. Verify the motherboard memory qualification list before purchase. No other specification overrides this compatibility requirement.