Those temps seem very high for the motherboard, though i don't know what part of the motherboard it is. As for the 4650, that temp is a bit high, but seems within the thermal limits of the graphics card. Try to make sure no vents are being covered when gaming, because the motherboard temp sounds extremely high and likely to cause damage to it.
Is it possible a virus is causing the temperatures to go so high? I bought the laptop about 3 months back, and the temperature didn't go so high in the first 1-1.5 months. Also, I keep the laptop slightly elevated so that the fan vent is a good 1-2 inches off the surface. Could a laptop cooling pad keep the temperatures down?