I use my desktop mostly for gaming and I've been having a problem with my case fan. Whenever I restart or boot up my computer, the fan works perfect but after I leave it on for 20-30 minutes, it turns off and no matter what I do it won't turn on. The only way to stop this is to play a game right when it boots up and it keeps on running. I know it has something to do with conserving energy but I want to know how to keep it running all the time.