1 of 1 people found this helpful
You cannot combine those two cards in a Crossfire combination.
Additionally, you will need to revert to the latest common driver for both cards, since the HD6xxx series products have been moved to legacy status and are not supported with the current Crimson drivers.
MODERATOR NOTE: I am glad to see you have resolved your issue. To help keep this post on topic and help other with a similar issue, I am locking this thread.