Of all the kernels, Abyss kernel gives the best perfomance with CM9 and other latest versions. It provides more battery life. The procedure for using it is explained in one of our older posts. Functions such as over clocking and voltage setting with respect to clock frequency could be achieved using AbyssNote 4.2 kernel.
AbyssNote 4.2 kernel can be used to flash AOSP/AOKP/CM9 ICS ROMS for Galaxy Note.
To get the steps go to : http://www.crackerspot.info/2012/04/flash-aospaokpcm9-ics-roms-for-galaxy.html
To Download AbyssNote 4.2 kernel : Click Here