i am sorry, to hear that. I assume you did all the common things, like updating drivers or clean installing drivers for the new card, restart PC multiple times, verify integrity of game files etc. etc.
if all that does not help, i assume it is the same issue as with the other posts, and we have no other choice than to wait for the dev team to take a look.
it might help the team to pull some log files. there is a thread about it here (not sure if related to this specific error, but getting logfiles might help either way): How to Make a Performance Capture