Comment # 33 on bug 1046962 from Mircea Kitsune

The freeze still happens with the Performance Enhance BIOS setting turned off,
the crash is not caused by my overclocking settings. It took 2 hours of playing
Minecraft in a row for it to occur again.

I noticed an important clue: In the case of Minecraft, the system only seems to
crash after mobs have loaded into view. If I only explore a world where no
entities spawn (be it full of voxel geometry), the freeze has never happened
thus far. This made me realize that all engines I noticed the freeze with have
one thing in common: A skeletal mesh is loaded into view. Could this be an
issue related to animated models by chance?

Note that I don't suspect Vertex Buffer Objects to be a cause: I once turned
off VBO in Minecraft, restarted the game, and still got a system freeze.