I thought I screwed up my Claymore but it is obvious that it is no longer working even with 8Gb gpus for other people as well. I am glad that I've managed to switch to another miner just yesterday. Now all my cards are working fine. Only the card on my computer under Windows is using the straps from Claymore with another miner, so this will be the only use of Claymore henceforth. Good bye good old Claymore! You are like Old Shatterhand in the wild crypto west