Yep, mine is 3000MHz. But the results are different by bios revision.
Using rev0703, my memory works fine with Fast-Boot=disabled only. without increasing IO and SA voltage.
In short, I would like to say:
Fast-Boot=disabled may increase boot stability. Only works with older bios? Increasing IO and SA voltage will give us some stability, but it is not silver bullet. Recent bios will give me worse result in XMP. ASUS mobos will not boot correctly even if we choose their QVL memory :-P