Ukrainian website KKK release a pic that seems like a slide from AMD. We can notice that PCIe 2.0 have some boost on the performance. But is that really it?

It is known that the difference between PCIe and PCIe 2.0 is the bandwidch. Though HD 3850 is weak, but in the slide it seems used up all the bandwidth. One PCIe 1.0 lane is 250MB/s, and one PCIe X16 is 4GB/s. is that all they used up or just another propaganda for promo the PCIe Gen2?