Ok so here's the deal. About a year ago, I bought a new chassis for my Dell Inspiron 570 and an NVIDIA GeForce GTX 460 to go with it. I really didn't have any problems except for my computer not detecting a "cover" so I have to press F1 to continue every time I start up my computer. (Damn Dell for not letting people customize.)
The only other thing was my computer's fans getting extremely loud while playing games like Skyim or Minecraft. Even opening Firefox makes the fans go crazy sometimes! It drives me insane when I'm trying to play games that require concentration.