AMD has updated their next-generation CPU and GPU roadmaps which confirm that the Zen 3 and RDNA 2 would be shipping to customers in 2020. The new products would utilize TSMC's bleeding-edge 7nm+ process node, delivering higher performance and much better efficiency than existing products.

AMD's 7nm+ Zen 3 'Ryzen 4000' CPUs Arrive Before RDNA 2 Based Radeon RX GPUs - Aiming A 2020 Launch Window

While AMD isn't yet done with their 7nm based Zen 2 or RDNA (1) GPUs, their roadmap confirms that we will get a taste of new designs in 2020. AMD's Zen 2 chip architecture would be replaced with the Zen 3 core while the 1st Generation RDNA architecture would be replaced with the 2nd Generation RDNA architecture.

AMD Zen 3 7nm+ Chip Architecture - Zen 2 Refined For Next-Gen Servers and Desktops

The 7nm+ Zen 3 core design has been completed and we can see production commence sometime in 1H of 2020. While Zen 2 was the first processor architecture to be based on the 7nm node, Zen 3 would be based on an evolutionary 7nm+ node which allows for 20% more transistors than Zen 2's 7nm process. The 7nm+ process node also delivers 10% better efficiency. It is possible that we may not get as significant of a core bump as we got with Zen 2 processors but nevertheless, the added performance uplift would put more pressure on Intel in the server and desktop space.

One of the flagship products of the Zen 3 core architecture would be the 3rd Gen EPYC line known as Milan. The EPYC Milan series of processors would be deployed in the Perlmutter Exascale super-computer, designed by CRAY. Early specifications for a singular node reveal that the Milan CPU has 64 cores and 128 threads and AVX2 SIMD (256-bit). There's also support for 8-channel DDR ram & support for greater than 256 GB per node.

Aside from Zen 3, Zen 4 and Zen 5 have also been confirmed. The 3rd Generation EPYC lineup which was officially confirmed as 'Genoa' during the 2nd Generation EPYC 'Rome' launch event. Zen 4 is currently in-design and will have a launch scheduled around 2021-2022. It will be using sub-7nm process node and definitely be a proper upgrade over the Zen 2 / Zen 3 design. As with every Zen generation, the Ryzen and Ryzen Threadripper lineups would also be available, battling out and dominating the desktop/HEDT landscape with sheer amounts of performance & disruptive value proposition.

AMD CPU Roadmap (2017-2022)