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
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal 0x409e5Ca22e06b7d0C3A34a5722fa6E3106ce37D4.knightkon01 -epsw x - dpool stratum+tcp://dcr.suprnova.cc:2252 -dwal DsmqED9mU2J6g9E6nrR5PxhYsnVt4BBtW6G.knightkon01  -dpsw x


try this