./sgminer -k nist5 -o stratum+tcp://pool:4087 -u user.3  -p x -I 19 -g 2 -w 256 --lookup-gap 2 --thread-concurrency 8192 --gpu-memclock 1500 --gpu-engine 1080 --gpu-fan 70 --temp-overheat 90

Just cant get it over 7 Mhz on 280x  So annoyed.