Run the stress tests and monitor temps, etc. If you're stable, then the goal is ALWAYS to try to get your volts down as much as possible while maintaining stability. So start dropping them a notch or two, then run stress tests and monitoring again. If stable, then another notch or two down......repeat until you're no longer stable/get errors, then back up a notch. Do final 24 hour stress test and if stable, then you're good!