I'm not sure how useful the strap is with the unlocked chips. I presume it helps to run higher strap lower multiplier, but I'm running at 100 strap, bsclk 100 x multi of 50 using voltage offset. I first thought I needed static Vcore for stability but it turned out to be the Clock Gen Filter settings. Now that is set to 20UF, I can run offset all the way to 5Ghz.