For AM4 socket, different mounting kit is required. Make sure it's included because it's not on the list when I looked at the PCpartpicker list link.
Another problem is PSU, 450w is just not enough power, don't settle for less than 550w.
Says the cooler supports an AM4 socket. What cooler WOULD include a mounting kit for AM4? Also why wouldn't 450 be enough if it draws under 450? I don't plan on OC or anything.