You don't need to set any environment variables for ccminer.
You mean those right ?
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
Ok thank you I will remove those, I did not see any gain by adding them and some post on internet report it was better (but it was probably placebo effect
) so I just put them because i did not loss hashrate either