can anyone help. mining with 1 1070 card i get ~70/s, but with 6x1070 only ~150?
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