Was meant to be a joke. Anyway N900 has by default 2 frequencies one minimum(125 MHz) and one maximum(600 MHz). When idle it would automatically take minimum and when it is in use it will jump up and down between minimum and maximum on demand. By changing the maximum from 600 to a higher value the minimum(idle) value doesn't have to change(though some people prefer it also higher so that device is more responsive in an event of something like a phone call). I don't use battery patch so I don't know what effect overclocking would cause there, but if the author of the patch stated that overclocking may cause problem when N900 is idle it would be wise of you to leave the min frequency alone. You should probably ask in the respected thread about the effects and also ask about changing voltage profiles(ulv, xlv, lv) normally you'd opt for the lowest that is stable on your device, but then again you should ask that on the other thread.