I replaced the malfunctioning GTX 970 in my xeon rig runing win7 with a Cayman Pro Radeon 6900 series that I got foir free. The trouble is the card can't get work.
The log file is full of the following.
05:16:04:WARNING:WU01:FS01:Failed to get assignment from '184.108.40.206:80': No WUs available for this configuration
: Could not get an assignment
The card is tested with furmark and is functional. I.m investigating posible driver issues. The card is listed in GPUs.txt
The one forum thread I found had a lot of "I just let it run and it got work eventually."