Serious overclockers need serious hardware, and that usually means going with liquid-cooling setups. Given the nature of computer components, though, a good portion of liquid-cooling gear has to be tailored for the hardware it's going to chill. Folks looking to build a seriously-screaming Kaby Lake rig can take a shortcut by picking up the Asus Z270 ROG Maximus IX Formula board with its included EKWB CrossChill II Hybrid waterblock.
EKWB says the waterblock on the Maximus IX offers "air and liquid cooling at the same time," meaning it will do its job even if builders don't hook up their water loop to it. However, doing so can result in big gains. The company says that firing up the water-cooling pipes can reduce the temperature of the power delivery hardware by up to 27°C. The board's integrated copper cooler uses standard G 1/4" fittings. Newegg has the Asus ROG Maximus IX Formula in stock for $390.