I've got black screen after trying 1.4 GHz. What's the point if having 3.5% lower frequency is doing good enough and no problems with black screens and reboots.
It would make sense if it would be possible to overclock to 1.5 or higher, otherwise not.
Never faced that with the opptimizer and I've had the very early version. Honestly, the more time I spend using it the more I am certain that 1100mhz is the safest number to leave my N9 at with stock voltage. But hey to each their own.
mine is running so far 1.3ghz with 1.375v sr off , still testing
I keep sr on. At the voltage you are at and the mhz, the only problem I encountered was the N9 heated up too quickly. I wasn't comfortable with melting my chipset, so I brought the clock down to 1100mhz at stock voltage and things worked out.
, but not your apps or nothing important.