Download and install PC Wizard, it should tell you what Video card you have, plus your other hardware. You should update all the drivers. http://www.cpuid.com/pcwizard.php
Or you could just pop the side off and see if you can see a motherboard and video card model.
After a driver update for REALTEK High Definition Audio all i get when i go to thier Web site is they direct me to Driver Detective which want to charge me.Is there a site where i can get one free.cheers.