stock cooling isn't that bad, but you should pick up some arctic silver 5 thermal compound. The thermal pad that's used on stock AMD coolers is more for comfort of the CPU rather than heat conductivity. It's meant to ease the troubles of worried heatsink installers that are worried about crushing the CPU. Arctic silver 5 should bring the temperature down quite a bit, just clean off the heatsink's bottom with rubbing alcohol and the CPU's die. Apply as thin sheet of arctic silver as possibly on the CPU die, install the heatsink and you're good to go.