I have 700 dollars to make a computer. This is my first time so I don't know what to buy. So the computer will be used for gaming(modern warfare 3, crysis) and multi tasking(opening a low end game(ex.maplestory) and firefox at the same time while watching a movie on media player classic. So can anyone help me?(if i am not supposed to ask people for build then sorry I didn't know and is this the correct section?.)