AMD responds to Radeon RX 480 power draw controversy
by from Techreport on (#1K3KJ)
AMD's Radeon RX 480 offers compelling performance for its price, but some reviewers have discovered a potentially troubling behavior from the card's power-delivery subsystem. Controversy arose when Tom's Hardware and PC Perspective discovered that the reference RX 480 is drawing more power than might be considered reasonable from the PCI Express slot's 12V rail.
The fine folks over at PC Perspective are especially insightful on this point. The site notes that the PCI Express specification limits connected boards to drawing no more than 5.5 ...