I manage to get cl 26 stable with 6580 mhz ram and 2193 fclk. using a 102.8bclk on 6400 mhz ram and 2133fclk to get the effective speeds of 6580 ram and 2193 fclk. This is just a slight improvement over my cl 28 6580 set but 53.8ns
1.23v soc
1.4v vddio
1.75v vdd
1,53v vddq