Granted different platform, but PPro on an Intel Mac background render: Instead of a hang, it would crash often using OpneGl right at the very end on the render. Still get them once and awhile using SreeD. What seems to be working is not rendering as a separate process over the last few days. But not enough renders and or still need to give it a fully loaded, heavy couple of scenes before I think this might end my crashing. Will give up speed for stability. 

Gary

"Those who lose themselves in a passion lose less than those who lose their passion"