OCInside has made great online CPU utilities before, such as their AXP pin modding guide. They've released another nice web-based app that will identify any modern Athlon64-based CPU, including Athlon64, Athlon FX, Turion, Sempron, Opteron and all mobile and other varieties. Anyone wondering what exactly their core is, rather than pouring over a long document describing each, I suggest taking a gander at this. It's easy to use and is a great way to discover exactly what you are holding or (if you are lucky) what you are buying, and would give you a better estimate of how far you could overclock. The utility is here at OCInside.