Those auto OC utilities work pretty good. For stability, they apply way more juice to the CPU than is necessary to reach a high OC though. Just to reach 3.7Ghz on mine, the software OC feature combined with the buttons built into the board to OC will raise the vcore to more than the 1.45 max recommended by Intel. I observed the auto OC feature on my board running about 1.55, which is suicide run high. If you are only keeping the computer for a couple of years, it's moot. Most CPUs will take over-voltage for a while. But damage from over voltage is cumulative and cannot be reversed. So after a year and a half or two years of excessive voltage, the CPU will quietly go off on it's own little permanent vacation.

You could probably get that CPU to run a 4.4Ghz or so with much less voltage. It would take some effort on your part though to do it in the BIOS. Higher voltage is required to get those massive OC. The downside is reduced CPU life and heat.

Electron migration occurs when voltage is too high. Kind of like electricity arcing or going where it is not supposed to go. Once that occurs, it's easier for it to occur again at an even lower voltage. That's why some OCers find it takes more and more voltage over time to keep the same OC, because they have damaged the CPU and it will always get worse, not better. With the eventual death of the processor in the end.

I've always OC all my computers. You can do it for years if you keep it cool and don't go overboard on voltage.