I have an HP Pro3500 Series, with Windows 7 professional 64 bit. It already has DirectX11, but it can not handle a lot of newer games. I am kind of out of my league here on this stuff, but I am intelligent, and can follow instructions. I want to replace the graphics card in my PC so that newer games will actually run. Current graphics card is Intel HD Graphics. Can I upgrade this, but putting in a new card? Or am I screwed? Please help.