How to over clock the N900

maemo (great) community have managed to set up CPU clock speed over 600Mhz, let's see how to do it in a few simplified steps :

1- Make sure your battery is fully charged !

2- Download one of those modded Kernels (choose the speed you want to use) :

125 - 900mhz kernel zImage-900mhz - File Shared from Box.net - Free Online File Storage (Tested to give best results in terms of speed for a normal usage situation).

125 - 825mhz kernel. zImage-825mhz - File Shared from Box.net - Free Online File Storage

125 - 800mhz kernel. zImage-800mhz - File Shared from Box.net - Free Online File Storage

125 - 750mhz kernel. zImage-750mhz - File Shared from Box.net - Free Online File Storage

125 - 700mhz kernel. zImage-700mhz - File Shared from Box.net - Free Online File Storage (Probably the safest to try if your only looking for a slight speed increase)

125 - 600mhz kernel. zImage-600mhz - File Shared from Box.net - Free Online File Storage

Or download the full package over here ! [Justupit.com - Host your file to Multiple Sites - Download - n900_overclock_v2.zip

3- Make sure you put the kernel file into the maemo flasher
tablets-dev.nokia.com restricted downloads folder on your pc so the flasher can find the file
in windows it's usually at C:\Program Files\maemo\flasher-3.5

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4- Set up your N900 to flashing mode :

+ Switch off the N900
+ Press and hold down the 'u' key
+ Connect a USB cable between the N900 and host PC while holding down the 'u' key
+ When the USB cable is connected, it powers the N900 and sets it to flashing mode
+ When the USB icon appears in the upper right-hand corner, the N900 is in flashing mode
+ Release the 'u' key
.
Ps : more about flashing procedure over here Documentation/Maemo 5 Developer Guide/Development Environment/Maemo Flasher-3.5 - maemo.org wiki

5- Run maemo flasher as admin (Still on windows) then run the command :

flasher-3.5.exe -k zImage-900mhz -f -R

(Of course, note that you'll have to change the zimage-900mhz to whatever kernel your using ie zimage-800mhz or zimage-700mhz)

6- it should take approx 10 seconds max, you're done !