It isn't about software that determines your OC'ability. It's all your hardware. You could use a program like clockgen to do some windows based OC'ing which I generally dont recommend, but some people do simply because it's their only option, but due so at your own risk. Remember like I said, raising the FSB is OC'ing your RAM too unless you lock the RAM at it's specified speeds in the BIOS, which I dont even know if your board can do.
Motherboard Monitor 5 and Speedfan are good programs for monitoring temps outside the BIOS.