Rumour has it that NVIDIA will unveil Ampere GPUs, the RTX 3000 series, next month at GTC 2020. While we already know that the architecture will be manufactured on a 7 nm process, new leaks claim that the RTX 3000 series will sport up to 826 mm² dies, 20 GB of VRAM and support for PCIe 4.0. All this and other improvements will combine to allow Ampere GPUs to deliver up to double the performance that the existing RTX 20 series does.
https://www.notebookcheck.net/NVIDIA-Ampere-GPUs-to-feature-2x-performance-than-the-RTX-20-series-PCIe-4-0-up-to-826-mm2-dies-and-20-GB-of-VRAM.454472.0.html