A few minutes ago my cpu fan was running at 6500 RPM. I know this isn't normal, at least for me. This happened because I forgot to turn my case fans up before playing battlefield 3. I couldn't hear the jet engine next to me with my headphones on, but I felt the earth quake this thing was making when my foot touched my computer desk and the heat emitting from case. My question is, is it safe for the cpu fan to run this fast? I want to know just in case I make this mistake again and don't catch it so quick. Thanks for the help!