The latest GeForce Game Ready Driver from Nvidia enables a limited set of ray tracing features for the GTX 1000-series. Compared to the new RTX 2000 cards, the pascal ones are clearly slower and Nvidia provides a set of graphs to reflect the performance gap. The green team also provides three tech demos where Pascal users can play around with the settings.
https://www.notebookcheck.net/Nvidia-launches-ray-tracing-driver-support-for-previous-gen-Pascal-GPUs.416199.0.html