PNY OPTIMA 2GB DDR2 667 MHz PC2-5300 Notebook / Laptop SODIMM Memory Module MN2048SD2-667 at Amazon.

Memory capacity upgrade provides improved system performance and responsiveness Deliver all the productivity your PC has to offer with PNY Memory Compatible with DDR2 PC2-5300 (667 MHz Bus Speed), DDR2 PC2-4200 (533 MHz Bus Speed), DDR2 PC2 ...

www.amazon.com