PC build need ideas/suggestions

I would really try and get the most for my money, my budget is $450-$500 range. If some knows a good setup, please reply to this post, also if you know how well it runs on games, (Any standard game) please post that also. I'm kind of a noob at PC's I just need some help, I understand alot though.

Thanks!

Do you have any parts already like a case or a monitor and keyboard maybe the OS as well? $500 for a complete entire system(monitor keyboard etc also) you really will not get a whole lot in performance, you will probably be limited to the Trinity APU's with that budget if you do not have any other parts.