Initial cards will be NVIDIA Founder's Edition models, cards from third parties are expected to follow in August or September. The site also writes that laptop versions are anticipated later in the year.
The new GeForce cards are reportedly based on Turing.
These sources indicate that Nvidia will be delivering the GPU and memory over to partners on or around June 15th. We expect the company to deliver Founder's Edition Cards to retail sometime in July. New Quadro cards based on Turing could debut at Siggraph in August.