ASUSR9280X-DC2-3GD5
sgminer.exe -k x11mod -o -u -p -I 19 -g 2 --gpu-memclock 1500 --gpu-engine 1090 --gpu-fan 70 --gpu-powertune 20 --thread-concurrency 8192 --lookup-gap 2
Only got ~2.5MH with lastest driver & rom


try just
GPU_MAX_ALLOC_PERCENT=100
sgminer -o -u -p -k x11mod -I 18 -g 2 -w 256 --thread-concurrency 8192 --gpu-engine 1100 --gpu-memclock 1425