You are locking the coreclock at 1250, you probolby need to increase it to 1500 or something. The watt on the card is unstable which indicate trottleing. The memory temp could be too high or power too low.

dont work my friend.........
Maybe need to enable P0 mode?
P0 is a must, GPU at 1650 and your memory OCs seem really low; I'm running +3375 in HiveOS (although normally with temperature being an issue, I would run +3000 (+1500 in windows)).