I have never OC'd before. What do you figure is a safe starting point for a rookie?
1.35 at 4.5?
If it's too much, does the system crash or what typically happens?
Depends on cooling, id start with 1.3v 4.4Ghz.
Worst thing that could happen is that itll crash/BSOD. And if coolings sufficient itll clock down throttle the voltage back.
An average 6700k will do 4.5Ghz 1.35v.
Also depends how you will stress test, more rigorous tests will cause temps to be a lot hotter and thus will reduce your OC margin - unless you delid and watercool.
i tried to oc my 6700k on the first day but didnt like the heat and power consumption. runs at 4,2 with 1,13v now
Not really an overclock since the 6700K does single core turbo at 4.2Ghz. This is just all core turbo But still handy to have.