Heya TheDudeSam,
I would suggest using ATI Tool to overclock your card. It is a very very small and super easy to use utility.
You can manually overclock, or let it overclock for you. If you let it overclock, it will dial back a few % once it starts getting artifacts. While you overclock your card you can stop it and manually scan for artifacts and keep an eye on your temps. Basically a "safe" overclock is as long as you're not seeing artifacts and your temps stay stable.
And don't worry that it is an ATI utility. It works with any ATI/Nvidia graphics card. It doesn't do anything more than raise the multipliers.
I don't ever recommend overclocking however unless you plan on upgrading soon anyways

It's always better to just spend a little more cash and get a higher speed card and keep it the stock specs.
Hope that helps!
