Win 7-64, blockchain drivers, v1.7.2, Samsung memory, RX4708GB, Uber Mix 3.1 mod, Heavy Mode 0, I=55, 1260/2000, 1224 H/s on Some (silicon lottery probably), but at least 1183 H/s on all.  

Very nice improvement.  

Heavy mode 3 slows down my system.


EDIT: same results for Win 10-64, 18.3.4 drivers.