well every card has its own personality . what so called safe on one card may be crash city on another ? how well binned the cards parts are and luck of the draw on how well built your card is can be the difference in a great overclocking card and one that's not if at all .
just get MSI afterburner and see what you get that runs 24/7 stable under any program you use the oc on ..
just take your time read up any NVidia oc tips/how to's and adjust in small increments .
as you know overclocking is all your own risk and nothing is guaranteed over factory stated specs
look over things as this to help get you started
https://www.youtube.com/watch?v=uIa4N2eCbfo
https://www.youtube.com/watch?v=z9ZkJ-9e568...