A-Tech 4GB RAM for COMPAQ PRESARIO CQ57-250SV | DDR3 1066MHz SODIMM PC3-8500 204-Pin Non-ECC Memory Upgrade Module at Amazon.com
Restored Compaq Black 15.6" CQ57-319WM Laptop PC with AMD Dual-Core C-50 Processor, 2GB Memory, 250GB Hard Drive and Windows 7 Home Premium (Refurbished) - Walmart.com
CMS 4GB (1X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Compaq Presario Cq56-219Wm Ddr2 Sodimm - A42 at Amazon.com
A-Tech 4GB RAM for COMPAQ PRESARIO CQ57-250SV | DDR3 1066MHz SODIMM PC3-8500 204-Pin Non-ECC Memory Upgrade Module at Amazon.com
Restored Compaq Black 15.6" CQ57-319WM Laptop PC with AMD Dual-Core C-50 Processor, 2GB Memory, 250GB Hard Drive and Windows 7 Home Premium (Refurbished) - Walmart.com