Do you mean nicehash's sgminer? If so, what parameters do you use for it?
Have windows 10, crimpson 16.9 driver.
1) Example for RX480 .bat pool sib.suprnova.cc miner sgminer-5.5.0-nicehash-46-windows-amd64
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_FORCE_64BIT_PTR 0
setx GPU_SINGLE_ALLOC_PERCENT 100
sgminer -k sibcoin-mod -o stratum+tcpsib.suprnova.cc3458 -u login.worker_name -p worker_password -g 2 -I 20 -w 128
2) Example for R9 .bat pool sib.suprnova.cc miner sgminer-5.5.0-nicehash-46-windows-amd64
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_FORCE_64BIT_PTR 0
setx GPU_SINGLE_ALLOC_PERCENT 100
sgminer -k sibcoin-mod -o stratum+tcpsib.suprnova.cc3458 -u login.worker_name -p worker_password -g 2 -I 17 -w 128