Its very challenging to find a proper break down on products , but AMD margins are coming from server cpu`s (thats from either TTP or GN, cant remember). Intels margins are on teh up, they were at 45% just 2 years ago. 14nm has really hurt them, but they have supply which AMD (at TSMC) doesnt have. The enws though is that Intel wont be buying up GloFo and rumour is they are heading to Samsungs 8nm process licenced.
I would imagine that 7NM is in a much better shape in terms of yields and pricing than it was 2 years ago when Navi10 and Zen2 were launched. But the thing is that Nvidia still makes over 60% of its revenues from gaming GPUs. Its why people shouldn't be paying significantly over RRP for Nvidia GPUs,as even at RRP they are making more than enough money IMHO! All the AIB partners complaining life is hard,are having decent years too.
The only gamers not being ripped off,are console gamers IMHO. Even the scalped consoles go less than for scalped slower/similar speed dGPUs. Plus a system like the XBox Series S,has an RX580 level GPU and a Ryzen 7 4800H level CPU,but goes for well under £300.