[.eXe]

Trying to overclock my Ryzen 5 2600, only been able to get a stable 3.9GHz overclock with a 0.132 core voltage offset. Is this already too high for long term use? I was hoping to at least get 4GHz, but I'm getting wary of the remaining headroom before I fry something.

[Breeze26509]

Generally 1.35v is the highest you want to go. I don't know what the standard voltage for your board is so the 0.132 offset can mean different things on different boards.
There is also a case for leaving CPUs after Ryzen 1000 at stock and letting Precision Boost Overdrive take care of it under load. It can sometimes give you a better all core vs manually overclocking it.