Regarding the problem that you are experiencing, the memory controller is built in the processor and the voltage range that it will support goes down to 1.425v.
The memory will support a wider range of voltages but in this case you may be limited by the processor memory controller.
I tried 1.450v - no change. This board seems to lock memory voltage to 1.5v regardless of proposed settings.
the latest firmware has fixed this issue. Thank you.