72°C seems ok, but it was after exiting coh2 right ?
Try furmark: http://www.geeks3d.com/20150410/furmark-1-15-2-gpu-vga-stress-test-opengl-benchmark/
If it crashes then I would recommend cleaning the gpu's fan (if not already clean) and changing the thermal paste.
Your CPU on the other hand is really too hot !
