Well you could start with posting what kind of cards you are using and what config you have now.
I use 4 card Vapor-x 7950
Config:
- Core/ Memory: 1050/1500 ~ 640 KH/s
- Core/ Memory: 11125/11250 ~ 670 KH/s
I run Scrypt (LTC), Vol default
Now, I want BTC with speed 640 MH/s or 670 MH/s, but can't config...