I have a Dell XPS 400: Pentium 4 Processor 540 w/HT Tech 512MB nVidia GeForce 6800 I play the Sims 2 and one day it just crashed and the monitor shut off (flashing) and a message flashes something about the video adapter. I also know I have a fan that gets loud sometimes, but it doesn't crash when the fan is on loud. From there, I'm not really sure what happened, a co-worker of mine said the hard drive could not be detected even in another Dell computer. So he reformatted it and gave it back to me, without any drivers at all. So I downloaded them myself and from there I replaced the video card (upgrade to GeForce 7600), sound card (soundblaster), and monitor. I still have the original problem I had in the beginning. I also updated BIOS and video, sound drivers etc. Could the fan be the problem or maybe something more? The game itself is not the problem as other games like it crash the same way. Please Help.