Amazon.com: HIGHDING IDE CD DVD-RW DVD-RAM Drive Burner Writer for HP Compaq 6710b 6710s 6720s : Electronics
HP Compaq Laptop Intel Core 2 Duo T5470 (1.60GHz) 1GB Memory 160GB HDD Intel GMA X3100 15.4" Windows Vista Business / XP Professional downgrade 6720s (RM390UT#ABA) - Newegg.com
Solved: Notebook Hp compaq 6720s - HP Support Community - 7091822
Review: HP Compaq 6720s
Review HP Compaq 6720s Notebook - NotebookCheck.net Reviews