No AMD Radeon "Navi" Before October: Report
AMD "Navi" is the company's next-generation graphics architecture succeeding "Vega" and will leverage the 7 nm silicon fabrication process. It was originally slated to launch mid-2019, with probable unveiling on the sidelines of Computex (early-June). Cowcotland reports that AMD has delayed its plans to launch "Navi" all the way to October (Q4-2019). The delay probably has something to do with AMD's 7 nm foundry allocation for the year.
AMD is now fully reliant on TSMC to execute its 7 nm product roadmap, which includes its entire 2nd generation EPYC and 3rd generation Ryzen processors based on the "Zen 2" architecture, and to a smaller extent, GPUs based on its 2nd generation "Vega" architecture, such as the recently launched Radeon VII. We expect the first "Navi" discrete GPU to be a lean, fast-moving product that succeeds "Polaris 30." In addition to 7 nm, it could incorporate faster SIMD units, higher clock-speeds, and a relatively cost-effective memory solution, such as GDDR6.
https://www.techpowerup.com/252382/no-amd-radeon-navi-before-october-report