Hi ya all, pardon my ignorance being a newbie in xmr,

Just a curious question, is it normal in sgminer-gm 5.5.5 mining xmr with poworcolor rx470 4g(elpida) clocking 1106@2025  to have such a big difference in hash rate(-20%) in the same hardware different os, same config --rawintensity 752 -w 8 -g 2,

windows10(beta blockchain 11aug)
 avg 861h/s each gpu
linux ubuntu 17.04(dagfix installed)
 avg 695h/s each gpu

while mining ethereum, I got 30mh/s in windows, a fraction bit lower 29.6mh in linux with the same conditions.

Please lead me to the right direction and point me out what could be wrong?

Thank you so much.