Is this your first time trying to Overclock the Nokia N900? if so make sure you install rootsh and then Enhanced Linux Kernal for power users. Restart then install enhanced linux kernal for power users settings restART again then go to xterminal and type "Sudo gainroot" then click enter and then type "kernel-config load ideal" now to make sure all has worked type "kernel-config show" in the same window if it says 5oo 800 then it has worked. if you restart now then you will have to do it again if your phone shutdown or hangs then do this again and type "sudo gainroot kernel-config load lv kernel-config limits 250 850" (pressing enter after every line) dont include the """"" when typing in xterminal if it works for you then thank me