I'm not concerned about messing up this graphics card as I will have to buy a new one if this doesnt work anyways. That being said, I would rather save money and just try and overclock this one.
You do know that it's likely soldered to the motherboard, right? Laptops don't work like desktops - you can't just upgrade them by popping a new part in. If you kill this one you will likely have to buy a new computer, or pay through the nose for repairs.