I have a rig with a 6xRX480 Asus.
I am with a dag driver.
Gore clock is 1160.
Mem clock is 2020.
The speed is 4511 h/s.
Is this ok or a need to change something to have a better performance?
This sounds right, my rx 480 gets about 750 h/s so if you x that by 6 it would be 4500. Monero mining uses a lot less power than ether dual mining which is nice. More stable too.
Which driver version you using for your 480's? I'm using 16.12.2 like for Zcash, but seems like people are getting higher hashrates, though I don't know what driver version they're running.