ASUS Laptop X52 Series Intel Core i3 1st Gen 350M (2.26GHz) 4GB Memory 320GB HDD Intel HD Graphics 15.6" Windows 7 Home Premium 64-bit X52F-X1 - Newegg.com
ASUS Laptop K52 Series Intel Core i5 1st Gen 450M (2.40GHz) 4GB Memory 500GB HDD NVIDIA GeForce 310M 15.6" Windows 7 Home Premium 64-bit K52JC-X2 - Newegg.com
Asus K50IJ K52F K52J K52JC Notebook Series 8X DL DVD RW RAM Dual Layer Burner 24X CD Writer 12.7mm SATA Internal Optical Drive Replacement CD / DVD Burners - Newegg.com
OFFTEK 4GB Replacement Memory RAM Upgrade for Asus K52JC (DDR3-10600) Laptop Memory at Amazon.com