Source: VR Zone While AMD graphics chips are engraved at 55 nm, NVidia's are still 65. Finer etching allows not only better control consumption and increase in frequency, but also burning more chips on each silicon cake and thus reduce the costs of manufacture.
NVidia is expected to burn chips at this level fast enough. Nothing will change in the architecture of their products. They should offer the G94b and G96b chips. As is often the case, the smaller die size benefits products for laptops, where the power consumption/output ratio is especially critical.
[translation by jeremy]