I modded the bios successfully and increased the mining speed to ~14.xxx mh/s with the following settings:
If the speed is at 14 MH / s then what is the power consumption?
I'm interested that, because 560 costs half price 570.

Yeah, I want to know too. If it's half of 570's power draw, that will be good.
About 40 watts each after undervolt and no 6/8 pin PCI-E power connector required. About 80 MH/s for 6 cards and 550W at the wall.
^^^^^^^ That's actually for the RX 460's, but the RX 560's should be very similar.