if you don't change vddmax to allow higher voltages, you will never get stable 1.2Ghz. With default voltages you pretty much can't go over 1.1GHz without losing stability of system.

So far the modules have been working great at 1150 mhz with Smart Reflex on. Haven't tried any higher yet.

Can't wait to get the voltage control.

Thank you Creamy Goodness!

Sunspider: 3097 ms

EDIT: 1250 mhz (SR off) starts stuttering but doesn't reboot. 1200 mhz (SR off) seems to work ok so far.

Yeah tricky thing with overclocking, especially at this stage, all could seem well then 3 days down the road you could be faced with random reboots.
But still, It's early days yet, good things take time.

Did people adjust the voltage up enough? I never did try that hard I think. This is 45nm cpu so I hope it can go 1.3 at least. Should I try on my n9 or n950? :\

My default voltage is either 1225000 or 1375000 and it's further lowered to 1175000 by smartreflex. Maybe. I didn't design this thing so it's hard to understand. Quick, someone read this and summarize.

Btw I uploaded a new version to read this additional voltage and smartreflex info, you can't change it yet though.

Creamy Goodness thanks for this, really can't wait to overclock my N9

Is there a strong impact on autonomy when disabling smart reflex ?

I tried to create a script to change change automaticaly the freq, seems to work so far but do you have any idea how we could run devel-su, opensh into that script ?

Quite unsecure but well, so far so good.

Really thank for compiling the overclock modules for N9. It's such a big step (at least for me) to make my N9 superior.

As you might have already read thru the information below which is taken out from the 3430 datasheet. It has some suggested "stable" vsel for different freq. Of course it may vary device from device but FYI my 2 years old milestone is stable using vsel 59 (stable means no bootloop which reboot itself infinitely).

I tried to find something like that for 3630 from its datasheet but no luck for that. But I hope this can give some educational guess for the safe yet stable vsel for our N9.

By the way, the voltage use for milestone (ie. vsel 60) is kinda different from N9 (ie. 1225000 or 1375000). Don't know how to relate them.


max_vsel
Frequency Stable (>=) Possibly unstable Probably unstable (<=)
550 56
800 58 56 .. 54 52
1000 60 58 .. 56 54
1100 64 62 .. 60 58
1200* 76 74 .. 70 68
1330* 84
*: Always unstable in some CPUs! Will damage CPU on prolonged use. According to OMAP3430 datasheet, max_vsel up to 66 should be acceptable. Above 80 will certainly severly damage the CPU on long-term scale. The most appropriate and stable settings seem to be either 800 MHz or 1000 MHz at max_vsel of 56 to 60.

I have seen the samsung galaxy s which uses the cortex a8 processor run stable at 1.4ghz. Some users even got it to 1.6ghz but i dunno how stable that was:P

I wish I could just get this to work...