The 3090 and the 4090 are on different process nodes (8/10nm vs 4nm), so you'd expect the 4090 to be more efficient. Pumping the same (or in this case more) pow

The 3090 and the 4090 are on different process nodes (8/10nm vs 4nm), so you'd expect the 4090 to be more efficient. Pumping the same (or in this case more) power through a more efficient node should result in improvements in performance. Hardware Unboxed covers this pretty well here: https://www.youtube.com/watch?v=aQklDR8nv8U&t=1365s https://www.youtube.com/watch?v=aQklDR8nv8U&t=1365s You can see that compared to the 3090Ti or the 6950XT* it's sipping power when it's performance limited. I think what many gamers see though, is that the performance difference is about all you'd expect going to 4nm from 8nm, based on performance gains we've seen in the past from other chips. Anyway, the rough idea is: If I built a 3090 on a 4nm node it would perform the same. Plus, NVidia has a track record of how they behave when the competition isn't up to snuff. Now, this is silly because using a more leading edge manufacturing process takes a ton of work and is an improvement overall. [*]: The 6950XT is manufactured on a 7nm node from TSMC. Note that there is weirdness in how each company measures their process node, which I won't go into here but just be aware that a TSMC N7 process might not be 7nm sized parts for all parts, and a lot of it has to do with how well they can layer things.