I built my rig with the help of a friend, which i sort of regret. anyway. I run nvidia gts 250. It is overclocked, which I am not even sure I need to do. I have 4 gigs of RAM and when playing games it freezes up. Everything is about a year old, but it has never really run well. I am really new at all of this and need some help. My BIOS is set to things that I didn't have a say in, he just did it because it is all greek to me. I understand a little of it now but really need help. This sucks. Please help me out.