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A-Tech 4GB KIT (2 x 2GB) for HP-Compaq Presario Notebook Series CQ61-402EA CQ61-402EO CQ61-402SA CQ61-403EA CQ61-403S CQ61-403SA CQ61-405EB CQ61-405ED SO-DIMM DDR2 Non-ECC PC2-6400 800MHz RAM Memory at Amazon.com
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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
4GB 2X 2GB DDR2 RAM Memory for Compaq Presario CQ61 Series Presario CQ61-410US | eBay