On RDNA 2 architecture
Samsung does use AMD architecture-based GPUs in its non-top-end Exynos SoCs. The Exynos 1480 platform has appeared on the Internet, and it has an Xclipse 530 GPU.
The characteristics of the GPU are unknown, but it is known that it is based on the RDNA 2 architecture, while the Exynos 2400 will receive the Xclipse 940 GPU based on the RDNA 3 architecture.
Samsung Exynos 1480 SoC will receive Xclipse 530 GPU
As for the processor part, the new platform will receive four large cores with a frequency of 2.75 GHz and four small ones with a frequency of 2.05 GHz. What exactly these nuclei are is still unknown.
In Geekbench 6, the new SoC scores 882 and 2808 points in single-threaded and multi-threaded modes, respectively, but this is even less than the Exynos 1380, so the results are hardly worth paying attention to.