I have managed to upgrade my fat PSP from 2.70 (OFW) to 3.90M33-2 (CFW). There is an option to overclock the CPU from the default value. Currently I'm running at 266/133 for games only (XMB cpu speed remains at default). How much of an impact on battery life will I be seeing at 266Mhz versus the default speed?
Also, is 3.90M33-2 still affected by the slow memory stick read speed bug from 3.80?