Thanks to the fancy SenseMI technology inside of AMD's new Ryzen processors, they will be self-overclocking with Extended Frequency Range (XFR) tech - and the better the cooling, the higher XFR cranks the frequency.
This means it will be a good idea to buy the best cooling your case can handle, so the frequency of your new Ryzen CPU reaches as high as XFR can push it. I wasn't too surprised to see Amazon offering Ryzen 7 1800X and 1700X bundles with Corsair AIO units, more specifically Corsair's damn good Hydro Series H100i V2 Extreme Performance Liquid CPU cooler.
The bundle lets you save $33, dropping the price of the Corsair H100i from $129.99 to $96.99.