Originally Posted by biggzy

can a CPU guru answer me a question plz? what i want to know is what stresses a CPU more, running at max frequency or maxing the usage of the CPU to 100%? and whats the dif between frequency and usage? thanx v much to anyone that can answer

Originally Posted by Flandry

Those are obviously connected issues. You overlooked voltage, which is the real cause of the damage. The way the CPU works, it jumps to a higher voltage to make sure that the highest CPU setting is stable, and the setting for the highest voltage on the N900 is already "overclocked" in the sense that it is known to reduce operating life.

What should be discussed in this thread is how to reduce the operating voltages and run at the same (or maybe slightly higher) clocks. That would increase battery life and not adversely affect phone life.

Everything is connected, so running at full CPU speed for long periods of time, which will heat it up, will accelerate damage to it. How much and how fast it heats up obviously depends on the maximum speed you have set, and the voltage it operates at for that speed--and your particular CPU.

Originally Posted by Rushmore

Have you tried any OC action yet, or plan to?

BTW, lower volt kernels are already proven to work on the 3430 (Droid). There are three different types of kernels and different clock ranges, but most chose the low volt version.

SetCPU is also very nice, since can dynamically control clock profiles while charging, usb, low on battery, etc.

Originally Posted by Flandry

What should be discussed in this thread is how to reduce the operating voltages and run at the same (or maybe slightly higher) clocks. That would increase battery life and not adversely affect phone life.

Originally Posted by Matan

You can try using my patch - http://my.arava.co.il/~matan/770/n900/freqs.diff

It reduces the voltage for the frequencies 550 and 600 to OPP3 level (the one used for 500 in Nokia's kernel, and uses OPP4 level for 720-1000 (the same level as originally used for 550). Highest level (OPP5) which is used for 600 in Nokia's kernel, is not used at all in my patch. Of course, the result will be lower maximum frequency in some CPUs, but my is stable at 1000MHz even at this lower voltage.

Originally Posted by eitama

"vi" - File editor that is apart of almost every linux distribution,
among those is the one on the n900.
vi uses some odd keyboard shortcuts to get around, the advantage is that when you get used to it, it's far superior than notepad.

You need to edit a file called pmconfig, which is located in side /etc
to do that, go tp applications on your phone : (make sure you have rootsh installed 1st)
1. Start X Terminal
2. Type : sudo gainroot
2.5. Backup your file, "cp /etc/pmconfig /etc/pmconfig.old"
2.8. To restore : "cp /etc/pmconfig.old /etc/pmconfig"
3. Type : vi /etc/pmconfig - you can now move around with the arrow keys, but you cannot edit the text yet.
4. Locate the cursor where you want to insert text, press "i".
5. You are now in edit mode, be careful in what you are doing - you can type in new letter, and delete with backspace and delete, write in what you need, press ESC.
6. You are not out of edit mode, make sure you did what you needed to do, to save and exit the file you press : ":wq" (with the ":") and ENTER.

It's not "code" just bash commands, like you had batch commands in DOS.

Originally Posted by ticktock666

Strange, I did exactly this, but the changes are not sticking, after reboot it reverts cpu speed back to 600 (from conky) even though when I check the pmconfig file it shows that the sample_max_freq is set to 750000, any ideas what would be the problem here ?