HP 2 GB PC2-5300F ECC RDDR2 667 MHz FB-DIMM. Internal memory: 2 GB, Internal memory type: DDR, Memory clock speed: 667 MHz. Width: 17.14 cm, Depth: 6.35 cm, Height: 11.1 cm. Size: 17.14 cm (6.75"). Weight: 0.499 kg (1.10 lb)