i got a amd athlon x2 5200+ processor w/heatsink. does the heatsink already have thermal grease on it? i don't see it on the processor. but there is plastic on the bottom of the heatsink with a square in the middle of it where the processor fits into and inbetween the heatsink and the plastic is a grey compound. it's not a perfect fit to the plastic there is some bubbles in it. is this the thermal grease? or do i need to buy some to put on the processor? i have been having problems with he cpu overheating when i'm playing mmo's and that's the only conclusion i can come up with. either that or i need a new mobo or a bigger heatsink or a better tower like intercooled or something.