Associate
Just as myself and 8 Pack commented, the RX 480 will not damage any motherboards from any reputable brand like Asus, MSI, Gigabyte or Asrock etc. He even tested upto 130W through the PCI-E slot with no ill effect.
Easy for you to say, my motherboard is out of warranty and 2 years old at this point. There might not be any short term damage but long term on older boards could potentially cause an issue in the future.
Will you replace my out of warranty board if it kills it? No?