под каждую карту кому нужно в SRB -
{
"cryptonight_type" : "normalv8",
"gpu_conf" :
[
{ "id" : 0, "intensity" : 58, "worksize" : 16, "threads" : 1},
{ "id" : 1, "intensity" : 58, "worksize" : 16, "threads" : 1},
{ "id" : 2, "intensity" : 0, "worksize" : 16, "threads" : 2},
{ "id" : 3, "intensity" : 52, "worksize" : 16, "threads" : 1},
{ "id" : 4, "intensity" : 0, "worksize" : 16, "threads" : 2},
]
}
и соответственно свои параметры поставить