I was able to reach 4100 Mhz, but the max temperature is 59C while encoding a video on Premiere an dusing all 6 cores at 100%
I read the max temperature is 65c, so that's too close, I also had to use 1.5v,
with 4088 Mhz I was able to reach a steady 55C, so if you ask me, 4C extra for 12Mhz is absolutely not worth it
The final stable speed I was able to reach was 4088Mhz, I still need to test it in games, but at full load the computer remained stable. I also enabled Cool & Quiet technology, so hopefully the processor should stay cool when it's not at full load
If it' reaches 63°C for a few minutes, it's not very good for the CPU and if this is just done once a month then I wouldn't worry too much, the most you'd have to do is underclock it during the process and overclock it back up once you're done.