Found a working option for 7950;

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100

lolMiner.exe --coin BEAM-II --pool beam.2miners.com --port 5252 --user

2bee2a120d2e9de76beff856c74be5849aae950830f1f9dee7fe62da3216451fdf7.GIZMO
pause
 How to change it for nicehash?