I think a big part of you not getting many responses is that it is a 'branded computer'. The OEM boards in those are so restrictive in what you can do, basically people don't OC them. Since it isn't a 'real' board from the well known manufacturers there probably aren't going to be many people here that overclock that actually know anything about the board in your system.
My guess is you simply can't do it in the bios, and would have to rely on a software overclock, and I'm not sure how good that is or even if its possible.