Is here a route to find out what category of graphics card type you can use? Without taking it out?

Any websites that scan your computer or something resembling that? I need to be sure, thankfulness

Is here a route to find out what category of graphics card type you can use? Without taking it out?

worst case scenario stir to http://www.belarc.com and download belarc advisor it should show you
Everest home edition.
Just look in your system info (accessories - system tools - system info)