Disable automatic reboot after BSOD
Crysis can get picky with drivers causing issues, so I wouldn't blame temps right away. Can you post a picture of SpeedFan when the temp "spikes"? Your BIOS version affects "CPU temp" readings too, and there could be a bug in it. Run Real Temp as Shadow mentioned and check to see if the Thermal Status is LOG
(throttling has occured while Real Temp was running) or HOT
(throttling is happening right now) when the CPU temp is 111C. If it isn't, then as I expected this is simply a bug.