Gigaram 4GB Single DDR2 667MHz (PC2-5300) CL5 SODIMM 200-Pin Notebook Memory Module Major IC brand 4GB 200-pin PC2-5300 CL5 16c 256x8 DDR2-667 2Rx8 1.8V SODIMM This module may be manufactured by Micron, Samsung, Infineon, Hynix or Gigaram. Help your laptop run faster and smoother, empower your laptop to achieve faster application loading times, faster system responsiveness, and increased ability to multitask and handle data-intensive programs. Review you machine specs and upgarde with this memory 100 percent compatible if your machine can handle 4GB per slot The CHY carries a Gigaram lifetime exchange or repair warranty against manufacturing defects. It may also be returned in original condition within 14 days of delivery for full credit minus shipping. We also supply unlimited lifetime tech support for this item.