I don't mean to be rude, but this forum is not the best place to discuss the Orange Pi PC board and the armbian sd card images. You will probably get a much better support in the armbian forum. And as I mentioned earlier, I don't even use armbian myself.
As for the sporadic board power-offs, having a good power supply is indeed very important. Hopefully you will obtain the appropriate power cable soon.
As for the sporadic board power-offs, having a good power supply is indeed very important. Hopefully you will obtain the appropriate power cable soon.