You should be able to get a pretty decent OC out that of that CPU; that generation has a history of being quite overclockable. As for everything else, moderate. RAM is slow to being with, so there won't be a whole lot of improvement. Graphics chipset isn't of any spectacular caliber, but again, will get a moderate overclock. I'd consider a new PSU, just something more reliable; it will put out the needed wattage, I'm just paranoid.