Is air cooler enough for 5600X?

So yes, 5600X is a mid-range processor with 65W of TDP, which will increase to almost 50% when PBO (Precision Boost Overdrive) is turned on. This heat needs to be taken care of for optimal CPU performance and longevity. A cooler like Noctua NH-D15 is well suited for 5600X and offers an extended warranty period.