I got the Harmattan stable at 1175MHz at v1275000 with SR on and kernel version 1.5.4 and UI 1.2.6, and without any warnings. Or alternative 1150 MHz at v1225000 (default)

But trying different set-up re MHz even with higher voltage gives either a warning about possible danger for the N9 or between 1175-1195 MHz unstability.

Question: Are you bypassing this warning to manage to get MHz at 1200 or even >=1300 or how is it possible to get this high performance?