AMD just launched its new Radeon RX 5700 XT and Radeon RX 5700 graphics cards (my review on those here) and in between we've had teases of the other SKUs in the Radeon 5900/5800/5700/5600 series graphics cards which use different Navi GPUs along the family.
The latest rumor is about Navi 14 that will go into the Radeon RX 5600 series graphics cards, based on the same 7nm RDNA architecture but knocked down from the Navi 10 GPU on the RX 5700 series. The new Navi 14 GPU should include 24 RDNA compute units (with 64 stream processors), for 1536 stream processors in total compared to the 2560 SPs inside of the Navi 10 GPU with Navi 14 taking up to 1900MHz GPU clocks, max.
We don't know what else the Radeon RX 5600 will feature, and whether it would still have 8GB of GDDR6 -- although, I think it will. NVIDIA launched its new GeForce RTX 2060 SUPER (my review here) with 8GB of GDDR6, up from the 6GB of GDDR6 on the regular RTX 2060. AMD would need to keep 8GB of GDDR6 on its Radeon RX 5600 series, while chopping down performance from the RX 5700 series.
I think we'll see something landing right on, in between, and matching the Radeon RX 590 and Radeon RX Vega 56, respectively. We will see in the coming weeks as more rumors, and hopefully a new product materializes.