Hello, another noob here, 

I'm using 1 Shappire RX 580 Nitro+ 8gb with hynix memory. I just modded the bios

this are my numbers:

260W ish from the wall
mining etherium at 31.8mh/s.
1250mhz on the core
2250mhz on the memory
around 100W for the gpu core
fan speed at 30% around 57ºC for a 24hours period.
-175mV on the core
from 949 to 955mV while hashing.

am i doing the things right? Thanks for your help.