512MB (2x256MB), DDR2 533MHz, PC2-4200
HP 512MB DDR2-533, 0.5 GB, 2 x 0.25 GB, DDR2, 533 MHz
HP 512MB DDR2-533. Component for: PC/server, Internal memory: 0.5 GB, Memory layout (modules x size): 2 x 0.25 GB, Internal memory type: DDR2, Memory clock speed: 533 MHz