hello FirstRigger

thanks for reaching out you are in luck because our gputool is now also for the amd including the way to see the what usage.
undervolting well this can be done in the sgminer or setting the power limit to -20%
spec question and card specific questions are better asked on the pimp forums to get feedback of your fella pimps.

as far as i can tell this is normal for a rx580 basic will do under full load about 271 doing this 12 times will give you a power need of 3250 Watt so depending on what mods you are running on the vbios of your cards i would say your doing ok

source : https://tweakers.net/reviews/5353/9/amd-radeon-rx-580-en-rx-570-rebrand-met-iets-snellere-chips-verbruik.html

with kinds regards,

dbct