Here is a double edged sword, tip for maximizing bclk/yet the wrong setting can produce CPU sensitivities to '00' at resets etc :



First set Skew driving voltage to 1.04v, set bclk skew to 0 , rest of skew to auto and start pushing bclk to find limit.
next set Skew driving voltage to 1.04v, set bclk skew to -8 , rest of skew to auto and start pushing bclk to find limit.
next set Skew driving voltage to 1.04v, set bclk skew to -12 , rest of skew to auto and start pushing bclk to find limit.
if bclk is increasing going to -12 then slowly lower skew driving voltage from 1.04v to try to max bclk again.

for reducing bclk First set bclk skew to 0 , set Skew driving voltage to 1.04v,rest of skew to auto and start rewducing bclk to find limit.
next set bclk skew to +12 , set Skew driving voltage to 1.04v,rest of skew to auto and start rewducing bclk to find limit.
if bclk is redusing going to +12 then slowly increase skew driving voltage from 1.04v to try to reduce bclk again.