First, try and set the power scheme to Portable/Laptop and see if that helps. Also, it is worth getting a cooling pad. These are a few good ones.
http://www.newegg.com/Product/Produc...82E16834999336
http://www.newegg.com/Product/Produc...82E16835192013
If that doesn't help, then you should considder going down the road of flashing your BIOS.