Just to confirm: Do you have --scrypt somewhere in your command? How long do you let it run before you read the speed?
What happens if you try this one:
-I 13 --thread-concurrency 8192 --gpu-engine 1080 --gpu-memclock 1500 --auto-fan -w 256 --shaders 2048 -g 2 --lookup-gap 2
Yes, I let it run for 30-60 secs then it appears to top... Thanks for your help, I think I caught the problem which is the drivers !!
Will try the new drivers tomorrow since I need to sleep..
And again thanks for helping !