I have a ASUS computer and am new to computer gaming, not gaming. I want to play bad company 2 and world of tanks and such I have 8gb DDR3 ram duel core AMD Athlon 2 x2 220 processor at 2.80GHz and a AMD 760G Chipset with ATI Radeon 3000 graphics card. But I only get about 20fps. Thoughts?