OK community
Claymore GPU0 = MSI AfterBurn 1:CardXXX (that means GPU3 in Claymore is MSI AB 4:Cardxxx)
So if you're having problem with let say GPU6 in Claymore, in the MSI AB select the card 7:Cardxxx and SPIN THE FAN to 100%
you will know physically what card it is!
Special thanks to Xeridea and Call_Me_Bambi