XMR mining

is anyone mining with Saphire Nitro+ RX580? can't get those cards to mine higher the 870Hs. Tried one click polaris modding and SRB modding pimp my straps but the hashrate never went above 870. Memory is hynix.
tried also 7x7
cards are 8gb
running at clock core 1411 and mem 2000


I have MSI and Gigabyte, they are doing 1050 on average.

any recommendations?
thanks.