Less is always better when it comes to power draw. That doesn't address my post though. Mobo's can easily supply well more than 75W through the pci-e slot. It's not dangerous or any kind of a hardship. Still AMD addressed it anyway. It's a non factor now.
We've been over this before, sure there a number of mobos that can & will support over 75W of power draw from the PCIe slot. That however was not an issue with high quality/recent boards, there are many budget systems out there with old, or fairly new MBs, but questionable power supplies that'll go kaput when you OC this card especially the AIB versions.
Therefore in the interest of everyone AIB's have gone
8pin & shifted power draw from the slot to the PSU, this will not only shield the MB & to a lesser extent PSU as well, but also AMD & the GPU maker themselves. You could say going 8pin is an idiot proof safety measure & in this care more is better IMO.