call it what ya want 🤷♀️
i just dont like anything that constantly ramps up and down. to me its like automatic trucks gear-hunting when your driving on hills. id rather have a constant 3.6 than having it boost from 3.0 to 3.8 all the time.
It will definitely need better-than-stock cooling to get the most.
What I'd do is set a voltage of about 1.375V and start increasing clocks from 3.5Ghz. Run a CPUz stress test for 5 or 10 min's and check temps. If under 65C increase 50Mhz and do it again until it gets to 65C under the stress test or it goes unstable. That would be a fairly safe overclock for your CPU, cooler and motherboard.
R5 3600 is 3rd gen...I wouldn't go over 1.25V on one and take whatever stable frequency it gives. Just leaving one of those in AUTO and using PBO with much better cooling usually gets better results and is definitely safer in the long term.
OP's got a 2nd gen, 2600, and that's who I was responding to.
If by stock you mean voltage and frequency left in AUTO it can go as high as 1.5V. But thats when one single core is boosting to max clock in a light workload, not all-cores pulling hard when rendering a video, and it's very brief in duration. In heavy loads it will drop as low as 1.2V to protect the processor.