I tested the beta bios 1634, however, I didn't have stability, even when trying to change the impedance to values already tested at the speed of 6200MHz (see in the photo the values that are stable).
with Beta 1634, the system loads, but tests with TM5 show errors within a few seconds. The SoC voltage can be made less high, but the MC voltage has to stay close to 1.400V.
