Hardware

Then the only way I know of is to find a hacked BIOS that does.

But overclocking that machine won't gain you much anyways.
The primary bottlenecks people have in computers these days are hard drive speeds and shared bandwidth USB speeds.

If your looking for some gaming speed, put a proper video card in your system. The one you have is for economy computers that spend most of their time in MS office. If money is an issue, find yourself a GTX 660, this is nVidia's economy performance line.