Carefully orient the heatsink onto the pins or threads of the mounting plate and secure in place with any provided thumb screws or regular screws.
For air coolers, you’ll want to install most models with the fans unattached. Carefully orient the heatsink onto the pins or threads of the mounting plate and secure in place with any provided thumb screws or regular screws. After that, it’s simply a case of reattaching the fan to the tower, and plugging the 4-pin PWM fan header into the CPU Fan slot on the motherboard.