WOW JCE !
From 032q to 033b7 here is the diff in the hashrate stats :
RIG1 (6x RX580 8gb gigabyte) : 6400 to 6900 !!!
RIG2 (6x RX580 8gb sapphire) : 6700 to 7300 !!!
I use 2 thread with 880 multi hash each thread.
multi_hash 944 should be better result.