If you're running a gaming machine it is always a good idea to get an aftermarket cooler for your CPU. Depending on how long the system has been put together and running, it may be a good time to reapply some thermal paste, along with a new CPU cooling solution. One of the temperatures on the motherboard may be for the area around the southbridge or nothbridge chipset. I remember one build I had where the graphics card hung right over my southbridge chipset (which already got incredibly hot) and made the temperature skyrocket. Just make sure you have adequate ventilation and air being moved front to back over the motherboard and you should be okay.