Hi experts of mining,

I have just started to attempt to mine ETH.
I am wondering if you can give me some advices on how to improve my performance please.

My specs are:
CPU: amd ryzen 5
GPU: 2 x  MSI RX 580 8GB
RAM: 16gb ddr 4

this is in a normal pc case with side panel inserted and case closed, so this is not a mining rig with 5 or more gpu.

I am using ethminer and these are some screenshots:

http://images.imagebam.com/f5/5c/cb/6cbb90622347253.jpg

as you can see my mh/s is very bad.
I know one rx580 8gb should mine at 30.2 mh/s (at least) so I should have 60.4 mh/s but I only have 40 mh/s.
1) Can you help me to get to 60 mh/s please? Right now I am using latest drivers from amd website.


These are my temps, with gpu-z and openhardware:

http://images.imagebam.com/f2/e4/77/eabab5622347233.jpg

http://images.imagebam.com/28/45/8a/cbaabc622347203.jpg

I have read that "safe" temps for gpu are around 90°C (for gaming I think, I dont know about mining), mine are 80°C and 72°C
2) Are these temperatures good?
3) Is there a way to reduce power draw?

Thanks ^^  and if you have more things to suggest please say them, I really want to get better at doing this as I am a noob.

Regards