Hynix PC2-4200U 512 MB SO-DIMM DDR2 SDRAM Memory is a single module memory unit with a total capacity of 512 MB. It has a bus speed of PC-4200 and is designed in SO-DIMM form factor. The memory type is DDR2 SDRAM and the capacity per module is 512 MB. The product is manufactured by Hynix and the model number is HYMP564U64CP8-C4 AB-C.