Hi, use pre-GCN cards 5870 gpu0 65% use gpu1 100% use Because it happens?
Settings the same for both? and not using a crossfire situation?
Settings same *2 not use crossfire
Are you using first gpu to do anything graphically intensive like watching video's or webpages, or games?
Also have you tried just using only that card to mine and see if it still stays around that hash rate by itself?
It could be several factors.. perhaps even the memory or just plain old "silicon lottery" losing on the first card..
Maybe Dok can help with this one though.
No only use for mining, i have 3 miner of equal characteristics same fail
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