300W is the maximum power, designed. Previous MI GPUs have had dual 8 pin connector, for power delivery. MI60 has 6+8 pin power delivery. It will use less power than 300W.
And yes, the GPU is much better than everybody thought it was going to be.
That is not true at all.
Alot of people were jumping on the 20tflop bandwagon from WCCFtech a while back.
Some people at overclock.net were claiming 44 billion transistors, 30tflop cards based on 2.8 increase in transistor density.
Heck, even AMD slides which initially stated 1.35x performance at the same power have shrunk down to 1.25x performance at the same power.
At a 1.25 increase in tflop count only, this card will be slower than a gtx 1080 ti in gaming considering the bottlenecks of the Vega architecture at higher frequencies and would thus lose to a rtx 2080 which got slammed for it's performance not that long ago.
With only this much tflops, it makes absolute zero sense for AMD to release this as a consumer gaming card which many people wanted. You would be looking at speeds at best 20% faster than vega 64 which put it slight faster than an rtx 2070 but much more difficulty being able price near that region because of the 7nm die and the 4 stacks of HBM2.
This is a new node and you think 25% better than what peoples were expecting considering Nvidia was crapped on for only a 40% performance jump with essentially the same node and was crapped on. Why do people rewrite history, so we can prop one company up and tear another down. It creates a more hostile forum environment because it turns things into videocard politics. Don't lie to yourself. Using the same power while getting 25% more performance is at the bottom tier of peoples expectations considering the move to the new node.
Just to illustrate this further, people said, the rtx 2080 was a disappointing jump with a 40% performance jump from the rtx 1080 to 2080 because the gtx 980 to 1080 was a 66% jump. They call it turding after it was launched because of this disappointing performance jump. So now 25% performance jump on a new node is better than what people were expecting?