Trying to electrocute my baby

[Variable]

Hah! Got your attention didn't I? Well the baby in question isn't my daughter, its the other, more expensive baby, my comp here. And the aforementioned electrocution is actually me thinking about stepping up the voltage to the CPU for some OCing. See, I've got a super cool comp with no less than 8 case fans (EIGHT!) and I've never OCed her. I OCed my GF4200 with impressive results lately, so now I want to try on my CPU. I figure worst that can happen is it burns out with that oh so lovely smoldering silicon smell (I've sampled that before, yum), and then I'll just buy the new Athlon ClawHammer anyway.

So here's the question. My BIOS supports voltage intervals of .15 steps. Current setting unfortunately reads "Default" so I don't know where to begin. Also, will tweaking the FSB up give a performance boost? I've stepped it up to 2x270 from 2x266 and not noticed much of a difference in temp or performance.

And if anyone knows the theoretical limits of a well cooled Athlon 2100, lemme know. Running at 1.76 now, I'd like to attempt to get maybe 2.0 out of her or more.