need the most cfm fan and largest heat sink for this system i don't plan on much overclocking asus z170 pro gaming aura and i7-6700k cpu Kingston DDR 4 hyper x 3333 pc26600
Can't go wrong with a Noctua D14/D15. They cool as well as most All in one liquid coolers and are very quiet in the process. CFM and heatsink largeness aren't all that important if the design and materials used are poor.