CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Compaq Black 15.6" Presario Cq57-339Wm Laptop Sodimm - A29 at Amazon.com
Nokotion 646177-001 Main Board For Hp Compaq Presario Cq57 Cq43 Laptop Motherboard Hm65 Ddr3 Fully Tested - Laptop Motherboard - AliExpress
Laptop HP Compaq Presario CQ57-435EQ (AMD Dual-Core E450, 15.6", 4GB, 500GB, AMD Radeon HD 6320, BT) - evoMAG.ro
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