Originally Posted by bumblebee_tuna

From experience with my Compaq, I've found that most prefab computers have a slightly different mobo than their retail counter-parts. Flashing a bios with what may even seem like the same mobo could be very risky; probably not even worth the risk.

The only other way you could OC is to get a new mobo of which you would probably need to reinstall the OS. (The OS is probably slightly different from the retail one, too.)