I have Ati 6900 and have 240 Mh SHA, when i try mining scrypt i have 17 kH?
Earlier (i reinstalled system) i was mining 270 kH.
What is wrong?
I think it cos your video card isn't getting enough power to do scrypt hashing. You can try MSI Afterburner to force voltage. Be careful though, use at your own risk etc.