AdoredTV reports that the Navi10-based Radeon RX 3080 XT could offer similar performance to the NVIDIA GeForce RTX 2070 at a sweet price of US$330. The RX 3080 XT is said to feature 56 CUs and will have a TDP of 190 W. AdoredTV also notes that AMD engineers are struggling to hit Vega20 clocks with early Navi samples and that they seem to suffer from power and efficiency issues.
https://www.notebookcheck.net/AMD-Navi-RX-3080-XT-could-give-the-NVIDIA-RTX-2070-some-serious-competition-early-Navi-samples-suffer-from-power-efficiency-issues.420170.0.html