well my rule of thumb for good TCCD memory with brainpower PCB is crank the voltage to whatever your boards max is (unless it's that DFI board that can put up to 4v lol, that's overkill) but assuming your boards max is like 2.9v, crank it to that, and then just push up the frequency using 2.5-3-3-7 timings......basically that little combo will guarantee you a pretty high ride before you start hitting bumps and gotta start messing with things