SetFSB

While many people use SetFSB because of its advanced options, many others will also stay away from it. Unless you know the CPU pulse control chip - also known as PLL, it is useless to use SetFSB. But after that, it can still overclock the system even though the other options are wrong. The most important condition is that SetFSB must be updated to support PLL's template. A handy guide to helping you locate the PLL chip on your motherboard here. While not a necessary tool for all, it is useful for many situations.