Is there a chart or list of CPUs and their potential with OCing?
How do you know if you hit 3.0gz with an AMD FX55 what settings would you need?
Understand that there are no CPU's 100% identical. Every silicon semiconductor device is unique, and as such, has different basic properties of electronics such as resistance, capacitance, inductance, impedance, and transconductance.
Although two consecutive serial number CPU's from the same fabrication, with the same stepping codes, may appear identical, they're yielded from different location on the silicon wafer from which they're manufactured, and like diamonds, each has it's own unique flaws.
Even though their dynamic operational characteristics may be very similar, no two CPU's will overclock to exactly the same stable maximum speed, at the same voltage and temperature. Additionally, in a dual core processor, one core will always become unstable before the other.
Hope this helps. Good Luck!