do you need to over clock it? if you are asking about drivers and how to OC, leads me to believe you are a mid level to novice user... do you really need to OC? you have a very fast powerful chip. nothing on the market will use what it can offer yet.
before/if you do OC, chances are you need to buy the fan first. if you are using the stock cooler, dont even bother trying. it wont kep it cool enough, and you risk cooking your ship.
There are excellent walk through stickied here at top of forum. they contain all your OC answers.