https://www.techradar.com/news/nvidia-geforce-gtx-1180-rumor-points-to-possible-september-launch

The latest whisper on the grapevine is that Nvidia’s third-party graphics card manufacturing partners will be getting shipments of next-gen GPUs in August (or possibly early September), meaning that fresh GeForce video cards – likely called GTX 1180 (at least in the case of the initial flagship) – will be inbound shortly thereafter.

This info comes from Wccftech.com, with the tech site claiming to have received confirmation of the aforementioned shipping timeframe, which follows previous rumors indicating a Q3 (July to September) launch for the next-gen GeForce cards.