Hi guys. pls help me. i just want to know, is it necessary to buy video card if im using amd a4 series 4020 with 7840d radeon graphics and a 6gb ram( 5.20 usable). my mobo is MSI A55M-E33 military class4. As of now im playing Far Cry 3 in low video quality without lag. Thank u for the answer and pls suggest any affordable video card for me. Thanks a lot