It depends you will overclock the card or you will use the default setting with no bios modification and another factor is what cryptocurrency will be mined by this card.
By default, this card on ETH gets 23 mh . In Overclocked mode video card can be raised up to 29.5 ~ 30 mh but you will deal with voltage and heat.
For example you can look here:
https://anorak.tech/t/msi-armor-rx480-8gb/1762
http://forum.ethereum.org/discussion/10323/msi-rx480-gaming-x-8g-custom-rom
Here you can calculate profit:
https://whattomine.com/
By default, this card on ETH gets 23 mh . In Overclocked mode video card can be raised up to 29.5 ~ 30 mh but you will deal with voltage and heat.
For example you can look here:
https://anorak.tech/t/msi-armor-rx480-8gb/1762
http://forum.ethereum.org/discussion/10323/msi-rx480-gaming-x-8g-custom-rom
Here you can calculate profit:
https://whattomine.com/
Thank's a lot for your answer.
I choose this card because i found that is a good deal. what can we buy with a EUR 275,79 ? i think nothing !
so if i buy 2 GPU (552 EUR), -> 46 Mh/s
you think is it a good way to start ?
thank's again