In this line of work, there's really nothing quite like the all-too-occasional experience of opening a box from Apple, and unveiling the shiny wonders squirreled away inside. In fact, it's the only event that never fails to draw all and sundry AJB staff from throughout the office into the Labs to catch a glimpse of what the tech company with only 3 percent market share worldwide has managed to innovate this time.

Squeeze that extra bit of power out of your existing hardware. Tim Dean looks at the principles of overclocking and examines the potential performance increase.