Your question doesn't really have an answer. Each chip is different, personally when I overclock I only overclock as far as I can go without a voltage increase. In fact on my backup AMD FX system I have actually reduced the voltage from stock. Just raise the multiplier a step at a time and leave everything, do an hour of prime95 or similar and rinse and repeat. Then when you think it is stable run about 6 hours of prime95 to test it. Some people say more but I think it's overkill. I'm playing games not handling top secret data![/
I've tried increasing multiplier and no voltage but it won't even boot it will POST but not boot