Hi there,

While I don't have an answer for you, my suggestion for where to start looking is for "flags" to use for your card. I don't know what the flags mean, but at least on my ATI card GUIMiner would have a very low hash rate (only a few MH/s) until I added flags like "-w 128" among others. Try to find a good guide about which flags to use for your card and see if it might help.

All the best!

EDIT: Just realised your "d,9" you mentioned is probably the flags - perhaps the two cards,  because of being nVidia vs ATI, need different flags to work efficiently?