Too hot. I suspect you don't have the cooler mounted correctly. Without removing the cooler, see if the 4 push-pin feet are evenly expanded behind the board. From the front side, check that all 4 feet are firmly planted on the board. Many times what happens is that the 4 push pin feet don't get seated correctly, leaving the cooler not securely against the CPU.
If that is what you find... Unlock the 4 push-pin thumb pads with a screwdriver (CCW turn, lift up) one at a time, then twist the thumb pads back CW and FIRMLY (while holding the cooler firmly to the CPU, push the thumb pad back down until you hear or feel it click. Do that for all four feet.