These hardlocks are damn weird! Read on...
I had assumed all games must be crashing; but upon testing many others, it seems only 2 games are crashing and under very particular conditions.
Live for Speed - can drive for hours and hours without any problems, but hardlocks in under a minute if I use the external sweep camera.
(Note that during this I can still control the car as I can hear the throttle and horn sounds when I press the respective buttons. Only the display locks up.)
Richard Burns Rally - hardlocks if I stay in the game menus too long, otherwise it's alright.
wtf :S
All other games working alright.
RTHDRIBL runs perfectly.