Got a 3570k here. I run it 24/7 @ 4.5 with 1.12 v.

For hwbot submissions i set it @ 5.0 with 1.32v.

PC is cooled with a custom waterloop from ek (360 total rad).

What would be a max safe voltage to push it even higher considering that i also use this pc for work and i can't afford to fry it atm

Short sessions is no problem at 1.45-1.5Vcore.

 

If your cooling can handle it of course. Though at a certain moment the voltage MHz scaling will stop and more Vcore might lead to more instability

And for Kaby Lake? same 1.45-1.5 for short sessions?

Noone?

Should be ok under water. Iam pushing 1,6V for short tests. But its risky here.