I am looking to get a dedicated graphics card for my HP Pavilion DV6... is that possible to have a dedicated graphics card in addition to the Intel Integrated Graphics and if so which cards will work? I want a pretty good one so I can play games like Diablo III and The Witcher.
The DV6 does show dedicated video cards as an option, meaning it probably has an MXM 3.0 slot in it for that purpose. Contact HP and find out what models are available. They should include the necessary heat sinks and hardware to install if you order from HP.
HP shows these as available for the DV6 when ordering new: