HP 405477-561 4 GB DDR2 667 MHz Registered ECC DIMM

HP 405477-561 – 4 GB DDR2-667 MHz Registered ECC DIMM

Overview :

This HP 405477-561 module is a 4 GB DDR2 memory DIMM designed for enterprise servers and workstations that require ECC (error-correcting code) and registered (buffered) memory for stability under load. It operates at a 667 MHz data rate (PC2-5300) and is built with a 240-pin form factor suitable for compatible server motherboards. The module is engineered to fit into data centre or corporate server racks rather than desktop systems, making it ideal for virtualization, database or high-uptime applications. It integrates with server memory subsystems that depend on ECC correction and registered buffering to maintain data integrity and electrical stability in multi-socket, high-density configurations.

Key Features :

• 4 GB capacity for balanced server memory expansion

• DDR2-667 (PC2-5300) data rate, 667 MHz clock

• Registered (buffered) with ECC support for error correction

• Dual-rank architecture (2Rx4) improves memory access paths

• 1.8 V operation reducing module power draw