CMS 4GB (1X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Compaq Presario Cq61-100Ee, Cq61-100Es, Cq61-100Ew - A42 at Amazon.com
1GB Black Diamond Memory Module for Compaq Presario CQ61 Series CQ60-123EF DDR2 SO-DIMM 200pin PC2-5300 667MHz Upgrade System Specific Memory - Newegg.com
A-Tech 2GB STICK For HP-Compaq Presario Notebook Series CQ61-310US CQ61-312EG CQ61-312EL CQ61-312SA CQ61-312SL CQ61-312SO CQ61-313AX CQ61-313EZ CQ61-31. SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory at Amazon.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