They don't get the benefit of markup, but they do have the benefit of inventory flying off the shelves. I'm not going to guess at nVidia or AMD's margins, but I

They don't get the benefit of markup, but they do have the benefit of inventory flying off the shelves. I'm not going to guess at nVidia or AMD's margins, but I'm sure they are quite happy with the additional income from GPU sales. This turns into more R&D, which AMD needs.