Voltage usually shows the difference when thermal throttling is actually caused by overheating, which is not my case.
It throttles at 50° the same as it does at 80 to 90.
To be more precise i had undervolting tested from - (150, 125,100,75,50,40,20)
For overvolting i tried with 0.1 steps to 1.1. I had turbooing set to a really low watt i believe 25 to 30 and duration on 28 secs.