Pushing the envelope on an XP-M gets easier because as you increase the Front Side Bus and increase the unlocked multiplier you are required to add more power to the CPU by increasing the Vcore; since the default Vcore of the X-MP is 1.45V you have much more room to play with. Now that we have an understanding of the potential, we'll test the theory by running stock tests and then overclocking the XP-M and XP and comparing results.