http://www.tomshardware.com/reviews...-10,4616-9.html

THG這邊會解釋更清楚..其實規範是規範..
不光可以由6pin這邊抽電..還可以透過PCI-E抽主機板的12V的

AMD’s Radeon RX 480 draws an average of 164W, which exceeds the company's target TDP. And it gets worse. The load distribution works out in a way that has the card draw 86W through the motherboard’s PCIe slot. Not only does this exceed the 75W ceiling we typically associate with a 16-lane slot, but that 75W limit covers several rails combined and not just this one interface

他由PCI-E slot 多抽了11W的電

下面的論述再看下去就更精采了...

這邊加碼gtx1080的情況
http://www.tomshardware.com/reviews...al,4572-10.html

很清楚的看到1080並沒有從主機板的PCI-E抽超過75W

這樣應該很容易看出RX480主要被噹的點.