I'm writing this short blog, so that anyone can see this information (at any point in the future), so there won't be a need to constant need to inform people about the pitfalls of the B560 motherboards.
This article will be a short news bulletin meant to inform potential Intel B560 motherboards buyers. The source of the information is Hardware Unboxed.
More other than not you'll heard that the motherboard you choose won't impact you CPU performance that much (3 - 8% in the worst case scenario). That isn't always the case. You can have a 30% drop in performance if you don't turn off the power limiter on your motherboard (make sure that your cooling is sufficient so your CPU doesn't throttle like crazy).
Sadly with some motherboards (like the MSI B560M Pro) even turning the power limiter off won't be enough to regain lost performance.
Watch the whole video to get all the info.
A SMALL UPDATE
Basically Asrock ain't on the up and up when it comes to their mobos. Watch the video to learn more.
The reason why Intel motherboards are such a mess, when it comes to within spec.
Hint it has to do with Intel