4GB 2X2GB Memory RAM for Lenovo 3000 Series Laptop C200 (89222FU) 200pin 667MHz PC2-5300 DDR2 SO-DIMM Black Diamond Memory Module Upgrade - Walmart.com
2GB (1GBx2) Team High Performance Memory RAM Upgrade For Lenovo 3000 G400 N100 Series (All Types) Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com