Nvidia has stopped producing GPUs based on its Turing architecture. The last of them included the likes of the GTX 1660, 1650 and 1630 series of GPUs. Once remaining stocks sell, they'll be gone and with them the "GTX" brand itself, leaving all Nvidia gaming graphics cards as "RTX" models. Well, with one possible exception, more on which in a moment.
The GTX brand was first used in 2008 as a suffix on the Geforce 9800 GTX. It then morphed into a prefix for selected high-end GPUs with the Geforce 200 series in 2008, such as the Geforce GTX 280.
