If you look into it more, you might be able to unlock some features in your bios that the Manufacturer usually hides away.
I use to overclock various OEM Systems this way, but not all BIOS can be fully unlock. There are many ways to do this with various bios editing programs, depending on what type of bios it is. The most unlockable Bios are usually AMI and Award from what I know, Pheonix and Insyde Bios are usually difficult to unlock and may require major Hex editing to make it happen. Even so, your chances of being able to change the bus frequency and cpu multiplier are slim.
I have done some Hex editing to allow me to modify my Laptop's Pheonix Bios for some overclocking features, and heck it took a lot of time but I was still limited to changing my bus frequency via Software.
Modify with unlock features and more menus
This just just a quick example_ It is possible to overclock an OEM built PC or Laptop but its quite difficult and most of the time your stuck to software overclocking_ but with some unlock features you can manually adjust ram speeds/timings and your HT multiplier making the software overclocking easier since everytime you boot up your PC, all the software has to do is adjust the Bus frequency without having to change HT multiplier or ram timings to adjust for the new Bus frequency. lol, its a lot to explain_
But, hey at least you know its possible, just not easy.
Your best option and easiest option is to pickup a cheap motherboard to overclock with.Edited by httuner - 10/5/11 at 5:32pm