setx GPU_USE_SYNC_OBJECTS 1
del *.bin
Color 0A
sgminer --nfactor 6 -o stratum+tcp://4upool.com:3111 -u xxx.1 -p xxx --gpu-fan 0-50,0-65 -w 256 -I 19 -g 1 --lookup-gap 2 --gpu-powertune -20 --gpu-memclock 1500,1500 --gpu-engine 975,1025 --thread-concurrency 24000
Please post a screenshot of your miner, that could happen for a lot of reasons
I would try this anyway:
add these: --queue 0 --scan-time 1 --expiry 1