This is not a rumor, as the information comes straight from the reputable news agency Reuters. It is still unclear if Turing is the previously rumored Ampere GPU, or Nvidia decided to separate the dedicated cryptomining hardware (Turing) from the gaming-oriented chips (Ampere).
https://www.notebookcheck.net/Nvidia-s-next-gen-GPUs-powered-by-Turing-chips-to-launch-next-month.282952.0.html