NVIDIA might use a 3nm process node for its next graphics card series. Such information comes from insider kopite7kimi.
In modern GeForce RTX 40, the chips are manufactured on TSMC 4N (this is an enhanced 5nm process node). It is assumed that TSMC will also serve as NVIDIA's partner in the case of RTX 50.
kopite7kimi also claims that GeForce RTX 50 will feature DisplayPort 2.1 support (RTX 40 has DisplayPort 1.4a).
GeForce RTX 50 graphics cards are not expected to appear before 2024–2025.
Alleged RTX 50 specifications: