ATmega's are overclocking-friendly, the undervolting of 0,3V should be no problem. I made some tests with that setting and all of these passed without problems. But make sure that you run your board under the worst case temp specs of atmel.
ATmega's are overclocking-friendly, the undervolting of 0,3V should be no problem. I made some tests with that setting and all of these passed without problems. But make sure that you run your board under the worst case temp specs of atmel.