So I have 3 Gigabyte cards and 1 EVGA. The Gigabytes generally perform very good, ~70MH/sec in Lyra2rev2. However I have one that is ~10-15MH/sec behind the other two. I even tried swapping risers with the idea that maybe the riser was causing the slow down. Anyway, Im lucky to hit 60MH/sec on this card. Is there anything I can do? Same exact settings among all the Gigabyte cards and the other 2 have great performance. Any tips on how I can address this?