solo mining for 3x 280X

.conf

rpcuser=x
rpcpassword=y
rpcport=6857
rpcallowip=127.0.0.1
server=1
daemon=1
addnode=70.161.219.122

.bat

setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 200
vertminer.exe --scrypt -o http://127.0.0.1:6857 -u x -p y -I 13 -g 1 -w 256 --thread-concurrency 8192