Do you only have dial up internet connection? If so you probably will not be able to play any of those games on line. 8GB of ram is way overkill. The motherboard that you have selected is an Nvidia based board but you have ATI video cards selected. You may want to pick a different motherboard or change to Nvidia cards. 3 Video cards is also a wast of money if you are only going to run 1440 x 900 res. one card would be more than enough.