OK, I renamed the tahiti.bin and it started mining after some errors. I restarted the miner 3 times and it works now. The stats are a bit odd 71/6/13/14 total 104 sols. I got 4 XFX 6GB 280x. They are a special edition and rarely found. My system is windows 10 with adrenaline 17.12.1. I will test with standard 3GB Tahiti, but I don't know the option for chosing which card to mine (like -di in claymore).

Edit: I found the option DEVICES. Again the miner gave 0 sols and restarted automatically endlessly, until I closed it, opened it again and began mining with 18-20 sols per card. This is for the rigs with regular 3GB Tahiti 280x