And this is how it looks if you're not following the overvoltage route but go instead in the other direction. I did
some undervolting, used cpuburn-a7 and cpufreq-ljt-stress-test to ensure stability and data integrity and gave sysbench again a try:
Exactly the same performance @ 1.2 GHz (still 158.2 seconds) but 10°C less under full load caused by 80mV less voltage:
