Check the whattomine.com if what altcoin is more profitable to mine with your rigs since your electricity is free you can earn without paying electricity].
Try to mine etherium with your card use claymore.
try follow this guide
https://bitcointalk.org/index.php?topic=2126975.0Thanks for your advice.
I have no experince about mine eth. How about minimum payout,
it will depend on the pool
for ethermine, default is 1, however you can edit this by going to the settings page
so how long we will get first payout from pool?
this is also dependent on your rigs hashrates, basically in ethermine minimum payout is 0.05
Why almost all coin use xmr tittle for miner?
no not actually, its just that AMD is more advantageous to XMR which has been forked lately, and now envaded by ASICs.