Take the PC case plate and install the necessary spacers and install the motherboard.
Secure the motherboard by screwing in motherboard mounting screws
(provided with your Motherboard)
Take the fans and put it into the factory provided fan holder. Ideally, radiator
should receive the coldest air possible. You must use the push mode, as it eases
the fan cable routing.
First you need to assemble the fan, fan holder and the radiator. Take the four
UNC 6-32 screws for each fan and route them through the fan holder holes and
fan mounting holes and screw them into the radiator mounting holes.
Secure the fans/radiator combo on the pc case plate with two M4 thumb screws,
which come together with the case.
Please check again if all the elements are mounted according to the sketch above.