Anyone give me some advice about run LTC with MSI 7950 Twin Frozr 3GD5/OC   (performance ,save power)

my config :

cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 21712 --shaders 1792 --gpu-engine 1050 --gpu-memclock 1250 --gpu-vddc 1.063



my hashrate about 610-625kh/s.Is this a good choice?

I use driver on MSI website :MSI Graphics Driver 9.002 amd_9002_v78_vga (Window 7 x64)

Thank for help