They adviced me to mine a coin with a smaller DAC, to have a better mining profit, but i don´t know wich one.
On the other side i saw people with r280x that can obtain 25 Mhs with their gpus, but i don´t know where is the difference.
I´m buying Rx570 gpu to mine, but i want to use the ones i have, if that can be done.
Thank you
Your card's memory controller is actually the problem - as the DAG grows, even though it can fit it in its RAM, it gets slower and slower at random access. This does not occur with GCN 2 and newer GPUs.
That's why 79xx are DAG size sensitive.
They are still good on some algo like equihash