the cheapest parts you can get that can play those games you mentioned at 1280 resolution and even higher would be the specs i mention and no other specs except of the one i mention. HERE GOES = amd 64 venice 3000, 6600gt, a cheap socket 939 nforce 4 motherboard. You can use your old ram that you already have, You need to spend more than 500 to get ram as well. If that is 500 US currency i am sure you can get what all i posted. Check websites and computer stores near you and ask for the parts i posted. YOu can even use your old computer case, thats what i did. THe specs i posted is the best gaming parts you can buy for 500 dollars, nothing else can beat what i posted unless you are a millionare.