Find a good Haswell it's very difficult task. I binned Sandy, Ivy and had though it's very hard to find a good CPU, before I started binnig of Hasfail )
Read this topic and was surprised by behavior of that board. I would return it back if I were you. Such many problems isn't great for new and expensive board.
You're so patient ) I always try to boot at 5GHz at least at 1.35V but it doesn't make me happy anyway. Vcore less than 1.3V for 5GHz sounds much better :banana:
Thanks. So it'll be harder to find good Devil Canyon because rule that claim good on air CPU probably good under LN2 doesn't work in this case.
P.S. As for me, good for validation chip it is 7GHz and more.