512MB, 667MHz, CL=5, PC2-5300 DDR2-SDRAM DIMM memory
HP 396520-001, 0.5 GB, DDR2, 667 MHz, 240-pin DIMM
HP 396520-001. Component for: PC/Server, Internal memory: 0.5 GB, Internal memory type: DDR2, Memory clock speed: 667 MHz, Memory form factor: 240-pin DIMM, CAS latency: 5