8GB (2X4GB) RAM Memory 4 Compaq Black 15.6" Presario CQ57-339WM Laptop SODIMM at Amazon.com
Specs HP Compaq Presario CQ57-252SA DDR3-SDRAM Notebook 39.6 cm (15.6") 1366 x 768 pixels Intel® Celeron® 2 GB 320 GB HDD Windows 7 Home Premium Black Notebooks (LT125EA)
4GB RAM Memory Upgrade for the Compaq HP Presario CQ57-229WM Memory (RAM) netperfekt Computers/Tablets & Networking
2GB Upgrade for a HP - Compaq Presario CQ57 and CQ43 (AMD DDR3) System (DDR3 PC3-12800, NON-ECC, ) - Imustturirin
4GB RAM Memory Upgrade for the Compaq HP Presario CQ57-229WM Memory (RAM) netperfekt Computers/Tablets & Networking
Compaq Presario CQ57 Accessing the Hard Drive and RAM - YouTube
8GB (2X4GB) Memory Ram Compatible with Compaq Black 15.6" Presario Cq57-339Wm Laptop Sodimm by CMS A29 at Amazon.com
Review HP Compaq Presario CQ57-303SG Notebook - NotebookCheck.net Reviews