First off I'll say I play lots of games, so this bothers me just a little. It all started with Starcraft 2, keep in mind this is during random intervals. I could play the game for 5 mins to 1 hour and the computer screen would go black and usually a looping sound, or just nothing for a little bit then background music or something. The computer would completely lock up and the only remedy is hard reboot. This is now happening with Call of Duty: World at War, Singularity. Both First Person Shooters, Starcraft 2 is a Real Time Strategy. Not sure if that helps, but FPS's are intensive with the GPU and RTS's are CPU intensive. So I don't know whats going on. For me and my hypothesis is when a certain sound goes off the computer crashes, but maybe it's just me, because when ever it crashes there is always a sound to go with it. I have a Qosmio X305 - Q701 laptop and have had it for about since probably August 2008 making this 2 years old. I never mistreat it or anything and have used some caned air. Some people think it needs a new thermal paste on the GPU and some think it's artifacting. I'm not sure what it is. All I know it freezes when I play games randomly sometimes it won't freeze. As far as temperature goes it's usually only gets up to 65 C. If there is anything else you guys need to go on let me know. P.S. - This ONLY happens during playing games.