my cmd line:
py silentarmy --use 0 -c stratum+tcp://cn1-zcash.flypool.org:3333 -u t1KmpFfV7iZyNefokBgbMUpSYyMZX2qm7cr.A1 --instances=1
6 cards
py silentarmy --use 0,1,2,3,4,5 -c stratum+tcp://cn1-zcash.flypool.org:3333 -u t1KmpFfV7iZyNefokBgbMUpSYyMZX2qm7cr.A1 --instances=1
Change the second command line --use to 1,2,3,4,5,6 if it doesnt work try 2,3,4,5,6,7