The limit, as I've understood, is (72 * 0.0125 V) + 0.6 V = 1.5 V, and is set by software. Hardware wise there is no limit. The limit I was referring to was that somewhere Igor said that do not overclock your devices over 500 MHz for constant use. Assuming he meant 500 MHz @ def voltages. Also, titan, can you comment on the idle frequencies? Is it wise to idle @ 125 MHz? Or should I go for 500 MHz? Or 550 MHz with starving conf, perhaps, as the GVHz rating is lower than default @ 500 MHz? 250 Mhz, as seems to me, has too little voltage difference and 500 MHz wins the day by quickly doing idle tasks and resume to sleep state? Also, wasn't there a some sort of bug @ 125 MHz?