yep… often read about that related to ATI driver. You can increase the timeout value or (if you sure there is realy no other issue and it should be the last step) you can disable the tdr check completely. At the moment we spoke about that in different topic where I added a link to the official description: CTD in DX11 mode without FPS Cap - #47 by MichaMMA ( some posts later I mentioned exactly the ATI thing 
, where in the topic the user own nvidia )
And, dont forget to set a fps limit in general… then your card will not run in useless high load and the issue can may be also avoided.