So I managed to OC my G3258 at 4.0GHz stable, at 1.2V. Might push it more if it's safe, is 1.2V kinda high for this?
Should be fine, I had mine on stock cooler at 1.25 vcore. Never went above 65c. Mine didn't seem to like anything below 1.25 at 4ghz, so you've got a chip that could push it more. I would recommend a cryorig h7 or an m9i if u plan to go further.