Games supporting NVIDIA's RTX technologies are assumed to have some form of ray tracing enabled but NVIDIA has clarified that RTX support not only refers to ray tracing but also to Deep Learning Super Sampling as well. NVIDIA has also released a list of games that support ray tracing and DLSS.
https://www.notebookcheck.net/The-RTX-in-NVIDIA-s-new-GeForce-GPUs-doesn-t-refer-to-just-ray-tracing-alone.324120.0.html