minerd -a wildkeccak_ocl -o stratum+tcp://bbr.suprnova.cc:7777 -u Worker.workername -p x   -d 0,1  -i 18  -l scratchpad.bin -k http://bbr.suprnova.cc/scratchpad.bin
pause

Works for me with 2 cards its the - d 0,1,2,3 for use more cards