Can I use the heatsink from my old phenom x3 2.1ghz on my new phenom x6 2.8 ghz till I can afford a new one? Another thing aswell... Im gona get a gigabyte gtx 660. Ive heard it uses about 180 watts. Im gona get a 500 watt psu with the phenom x6 and gtx 660 so can it handle those for a while?