Again, we repeat: a Nokia engineer said clocking it at 600Mhz is _dangerous_. Now, if you feel smarter than the guys who dsigned the device and have the specifications at hand...

And no, it doesn't stay clocked at 600Mhz as any powertop session is going to quickly reveal. EDIT: Note that it seems it doesn't stay clocked at 600Mhz because of the SGX, and without using it, you can happily let it clock at 600Mhz. See a few posts below.