HP/Compaq 383541-001 512MB 400MHz PC2-3200 DDR2 SDRAM SODIMM Genuine HP Memory Module for Notebook TC4200 NC4200.

HP/Compaq MT9VDDF6472G-40BD3 512MB PC-3200 DDR 400 CL3 Memory Module.

HP 491503-061 2GB PC3 10600 DDR3 1333MHz ECC Unbuffered CL9 240 Pin Dual Rank DIMM Memory For HP Proliant Server