It won't those cpus basically just pick a temp and keep running faster until it reaches that temp. Id still consider undervolting it some as it'll likely speed the cpu up and also lower temps
First thing, a water cooler is not better than a Similar sized air cooler. Until you get the water cooler bigger than what you can hang off a cpu as an air cooler it's not any better performance wise.
With that in mind what watercooler do you have?
Usually with a 2600x you can actually undervolt it a bit and lower temps and keep boost clocks same as usual
It won't those cpus basically just pick a temp and keep running faster until it reaches that temp. Id still consider undervolting it some as it'll likely speed the cpu up and also lower temps