It happens in SW session, not immediately, but after some time of use. Could be minutes or hours. The only way to remedy it is to check "Software OpenGL", which obviously defeats the purpose of having the card in the first place.
It only takes place when running SW2011, with one exception though. I managed to induce same crash when trying to run Netflix movie. In this case it happened when browser was switched to full screen mode.
SW technical support at CATI suggests that card needs to be matched to system mother board, but people who built this computer do not know anything about ithat.
Thank you for any input.