could someone please help. this is my command for normal scrypt.

u xxx.xxx -p xxx  --worksize 256 --lookup-gap 2 --thread-concurrency 8192 -g 2 --intensity 12 -Q 0

i have a vtx3d 7870 le tahiti and i get 345khash/s.

could some please tell me how to change it for vertcoin. thanks.