many thanks, it's working now!
what steps recommend increase the multi hash? 580 hashrate is very good (prev miner: 930H/s, jce now: 1030H/s), but the 570 a little bit slow (prev miner: 760H/s, jce now: 680H/s)
All, as I thought... Miner used settings for 8gb card on 4gb card...
Optimal settings... For 8Gb try
{ "mode" : "GPU", "worksize" : 8, "alpha" : 64, "beta" : 16, "gamma" : 8, "delta" : 8, "epsilon" : 8, "zeta" : 8, "index" : 1, "multi_hash":944 },
{ "mode" : "GPU", "worksize" : 8, "alpha" : 64, "beta" : 16, "gamma" : 8, "delta" : 8, "epsilon" : 8, "zeta" : 8, "index" : 1, "multi_hash":944 },
for 4Gb:
{ "mode" : "GPU", "worksize" : 8, "alpha" : 64, "beta" : 16, "gamma" : 8, "delta" : 8, "epsilon" : 8, "zeta" : 8, "index" : 1, "multi_hash":472 },
{ "mode" : "GPU", "worksize" : 8, "alpha" : 64, "beta" : 16, "gamma" : 8, "delta" : 8, "epsilon" : 8, "zeta" : 8, "index" : 1, "multi_hash":472 },
If with 472 will be error try one of 472 lower to 464.
Thanks. I will try..