Re: Why does Nokia give us such a low default 600MHz?
 

Yep, as a few above me already stated:

1) Better unit yields

2) Statistically better stability(for a given number of units)

There's a reason why certain CPUs will overclock better than others of the same bin, and why the manufacturer does not sell them at a higher bin, for a CPU manufacturer it all depends on yields. For a device manufacturer, it all depends on what speed will give the best stability for a large number of units, while not compromising performance.

Re: Why does Nokia give us such a low default 600MHz?
 

Jakiman's overclocking summary is useful on this subject. See his signature for the link.

Re: Why does Nokia give us such a low default 600MHz?
 

maybe overclock will short the life of the device

i dont think that the n900 has the proper refrigeration

Re: Why does Nokia give us such a low default 600MHz?
 

shorter lifecycle and higher risk of data corruption. Data corruption is IMO worst because i think that we would have lots of really really weird bug reports in bugzilla. Data corruption may seem like bugs in applications and sometimes it´s really hard to spot and it can lead to lot´s of wasted time on bug hunting.

Re: Why does Nokia give us such a low default 600MHz?
 

Reasons:
a) They can buy cheaper components to build same model.
b) They can produce new models cheaper.

(battery? stock battery life is 5h, even less, under moderate stress. If you work more than 4h59min/day, you need two-three bats or a charger int your pocket... so no matter if OC under heavy stress longs 2h30min, the 5800 Xpress Charger does the job... as with stock kernels)

Re: Why does Nokia give us such a low default 600MHz?
 

just because it works at 1 ghz doesnt mean its a good idea to run it at 1 ghz.

if they planned on using a higher clocked cpu, they would have used one that was build to run at such speeds.

Re: Why does Nokia give us such a low default 600MHz?
 

If they planned for 1Ghz chipsets, it would be able to be overclocked even more. :D

Re: Why does Nokia give us such a low default 600MHz?
 

the N800 and 810 kernels for diablo were "overclocked" compared to the chinook kernels.
maybe nokia will release an official higer clocked kernel.
maybe they wont.
stability is the most important thing for most....

Re: Why does Nokia give us such a low default 600MHz?
 

Personally I think it is beyond tech, it's business related. High frequency will be kept for new device.

ARM 11 is used for N800 + N810.
ARM Cortex A8 is used in N900 + future Nxxx.

Re: Why does Nokia give us such a low default 600MHz?
 

They were not overclocked for sure. Those chips are "speed sorted OMAP2" and are really rated by TI as being able to run at 400MHz clock frequency. Have a look here:
http://www.mail-archive.com/maemo-de.../msg10619.html
https://s3.amazonaws.com/ppt-downloa...tablets565.pdf

Even today, there is a higher speed version of OMAP3530 (a chip which is similar to OMAP3430 used in N900), which can run stable at 720MHz instead of standard 600MHz. But this higher speed version of OMAP3 chips became available only recently, and I guess it was too late for N900: http://newscenter.ti.com/Blogs/newsr...ns-228688.aspx