Whenever I open Counter-Strike: Source, my computer starts beeping in random rhythms. Sometimes it beeps continuously (Beeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee....p ). In DotA, it beeps once or twice a game. Here are the temperatures of my computer idling.
If you experience slowdowns with the beeping then it's a heat problem. I see your GPU is getting upwards of 59 degrees Celsius in game; that's nearing a dangerous temperature range.