Yup tried default clocks and all. It was a CTD with some error message, not a hard lock, blue screen etc.
Seemed to be a small number of players encountering the same crashes as me. The game crashed so often, even more than batman arkham knight
Something up with your PC. ROTTR never crashed on mine, or Batman. I never overclock. Forza Horizon 3 has started to crash a couple of times since the last patch, well maybe not now if a new patch has been released as haven't played it since yesterday morning.