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Compaq Presario CQ57 - iFixit
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
HP Compaq Presario CQ57 specifications
2GB DDR2 800MHz RAM Memory Upgrade for Compaq Presario Notebook CQ56, CQ57 Series (PARTS-QUICK) - Walmart.com