Monarch wont tell you the stepping so there is no way of telling just how high you can overclock it. 2.4 for sure and most likely 2.6 but there is no gurantee. Basically its a crap shoot range of 2.5 -2.7. I think you have a very good chance to hit 2.6 with one though providing your system is set up for it and your own knowledge it adequate. Ceiling is around 2.7 or a bit higher with air cooling.