my memory IS on a divider.....
its running at DDR-333 as opposed to 400 or what ever
2.6Ghz if you've got a good HSF....
2.6Ghz if you've got a good HSF....
In my opinion, a safe overclock would be one that is your highest (stable) overclock WITHOUT increasing any of the voltages.
Obviously, to find its absolute highest clock, you're going to need to give the voltages a big kick.