AMD Navi 48 is the first confirmed RDNA4 GPU
The company indirectly confirms its first GPU for the new series.

The NV48, not to be mistaken with 20-year-old NVIDIA NV48 GPU is the short codename for AMD Navi 48, the next generation discrete GPU. The development for this RDNA4-based GPUs has progressed, and it has now reached the ROCm (Radeon Open Compute Platform) Validation Suite.
AMD software engineers are preparing the groundwork for the GPU by introducing the first patches, including build target and initial configuration files, for the GPU. Sadly, this update does not provide any confirmation on the specs.
AMD has not confirmed when or in what form the RDNA4 architecture will be released, but rumors have pointed towards scaling down the plans by not introducing high-end GPUs in the upcoming generation. The new Radeon 8000 series might be based on two GPUs alone.
Navi 48 GPU confirmed, Source: Github
Navi 48 is believed to feature 32 WGP (Work Group Processors) and it is not expected to compete with NVIDIA high-end GPUs like GB202 (the flagship in the upcoming generation). Instead, AMD is aiming at the upper mid-range and mid-range segment with two RDNA4 GPUs. Thus far, there is no sign of the smaller one called Navi 44, which is expected to feature around 20 WGPs.
AMD RDNA Series GC (Graphics Compute IP)
- GFX101X: RDNA1 Discrete GPU
- GFX103X : RDNA2 Discrete GPU Integrated GPU
- GFX11XX: RDNA3 Discrete GPU Integrated GPU
- GFX115X : RDNA3.5 Integrated GPU
- GFX12XX : RDNA4 Discrete GPU Integrated GPU?
AMD RDNA4 GPUs should be the first consumer GPUs from the company supporting PCIe Gen5 interface, and possibly newer memory technology known as GDDR7. Neither has been confirmed yet.
Source: ROCm (Github) via @Kepler_L2