I don't think changing PhysX settings would change performance or stability. Changing it may even work the other way around (i.e. less stable).
Jep, you´re right. Aktivated PhysX again, can´t see any Performance loss/gain. The stuttering only appears when Vsync is disabled.
However, the freeze Problem with 4GB in my Computer still exists. As said, i tested the Ram with "MemTest" from a Linux Boot CD. Diagnostics are all okay, so the Ram is not the Problem, and all other games are still working fine...
It´s a real Mystery.
