4GB 2X2GB Memory RAM for HP Presario Laptop CQ61-325ES 200pin 800MHz PC2-6400 DDR2 SO-DIMM Black Diamond Memory Module Upgrade System Specific Memory - Newegg.com
4GB 2X 2GB DDR2 RAM Memory for Compaq Presario CQ61 Series Presario CQ61-410US | eBay
4GB Kit (2x2GB) Memory RAM Upgrade for Compaq HP Presario CQ61-313US | eBay
8GB (4GBx2) Team High Performance Memory RAM Upgrade For HP - Compaq Presario CQ61-105EI CQ61-105EK CQ61Z Laptop The Memory Kit comes with Life Time Warranty. at Amazon.com