Lower frec 250? I fell comfortable using Lehto 125 one.

Huge thanks to Lehto for sharing this, I'm now running with the 900MHz/500dsp with no problems whatsoever and everything seems way smoother. Now it's just to see how this affects the battery consumption, or the OTA updates. But it's easy to reflash so it's absolutely no problem either way.

Someone asked for a one-hour GPS test. I just ran Mapper and Maps for more than an hour with no problems. I'm running at 800mhz.

Maybe it's time to put the original quote in here, before it gets lost:



There you have.

Also, consider if there's a reason the smart people as someone said previously didn't tell you how to do it even when then there's a kernel parameter for it.

Of course, you're free to do as you wish.
So, testing revealed the thing is unstable at 125Mhz, and documentation reveals that 720Mhz is the last in spec frequency. 600Mhz AND anything over it (note: 600Mhz is included!) is known to sensibly reduce core lifetime.

but only if you're running the whole tim @ 600mhz or higher.
the new kernel just allows the n900 to clock higher. so if needed it can clock above, but it's not locked @ this frequency.
on normal use, there is no difference between the new kernel and the stock one.
and what means reduce the lifetime? from 10 years to 4 years?
that it is worth.

but thanks for pointig this out.
it's a risc, that shouldn't be underestimated!!

Source?
...........

Yes, that's why I spent a few minutes googling for the quote
But what are all those people going to do? Keep it idle? No, they're going to play pcsx4all which will lock it at whatever the maximum frequency is.
The expected lifetimes are unfortunately not public AFAIK.

Nokia-side troller... locked-at and lifetime scale were long time discussed before overclock mod.

125Mhz comes from https://bugs.maemo.org/show_bug.cgi?id=7116 (as you can see, testing firmwares had scaling_min_freq set to 125Mhz). There has also been comments about that on IRC.

720Mhz comes from the 3530 datasheet, which is public. It also indicates it should be run at the same core voltage as 600Mhz, which may or might not apply to the 3430...
Actually, seems that only applies to newer 3530s.

Unfortunately for the fear mongers, the expected lifetimes are public. They are even reported in this thread. You even thanked that post: http://talk.maemo.org/showpost.php?p...2&postcount=91

I'll summarize (again) the data: the CPU is supposed to work for 100000 hours if not more than 23000 hours of those are at the highest voltage level (the one used for 600MHz in the standard kernel and for higher speeds in the overclocked kernels). In other words:

If you stress the CPU for 6 hours every day, it is supposed to hold on for 10 years. Even if the CPU is locked always on 600MHz it should work for 5 years.

Please note that TI talk about voltages, not frequencies.

In my kernel (which already works on my device with no problems for a few months), I use OPP3 for 600MHz and OPP4 for above that, and it seems stable, so I even lower risks then with Nokia's default configuration.