AMD RDNA 4 GPUs To Incorporate Brand New Ray Tracing Engine, Vastly Different Than RDNA 3

AMD RDNA 4 GPUs To Incorporate Brand New Ray Tracing Engine, Vastly Different Than RDNA 3

It looks like AMD is making some big changes with its ray tracing engine. The upcoming RDNA 4 GPU architecture.

AMD's next-gen RDNA 4 GPUs will feature major ray tracing engine changes compared to RDNA 3.

The latest comes from Rumor @Kepler_L2 which shared patches for AMD's next-generation RDNA 4 GPUs and its RT (Ray Tracing) engine. It has been reported that the AMD RDNA 4 GPUs that are expected to launch alongside the Radeon RX 8000 graphics card lineup are going to include a new RT engine that offers much better performance than the current engine on the RDNA 3 chips. It should be.\

AMD is in an uphill battle against NVIDIA who are a generation ahead of them when it comes to ray tracing support. While the first generation of ray tracing support came to AMD in 2020 with the debut of the RDNA 2 graphics family (Radeon RX 7000), NVIDIA reintroduced it in 2018 with its Turing (GeForce RTX 20) lineup.

Despite NVIDIA's launch a year later, the RDNA 2 GPUs were lacking in front of Turing GPUs and had an even harder time competing against the Ampere (GeForce RTX 30) lineup. With the current Ada (GeForce RTX 40) GPUs, NVIDIA is still miles ahead of AMD's latest Radeon RX 7000 (RDNA 4) lineup.

Image Source: Anandtech Forums

While it's doubtful whether AMD will catch up to NVIDIA's strong RT lead in games, it looks like we can expect some big changes with its RDNA 4 GPUs. Kepler goes on to state that the RDNA 3 ray tracing engine was an upgraded version of the RDNA 2, which will be the case for Sony's PS5 console, which is going to use a custom RDNA GPU with elements of the RDNA 4 GPU such as the BVH8. Traversal While RDNA 2 and RDNA 3 GPUs currently only support BVH4 traversal.

Based on Kepler_L2's post Anandtech Forums, the GFX12 (RDNA 4) RT block looks very different with the complete removal of the BVH4 traversal. It will be interesting to see how the RDNA 4 GPUs fare in terms of ray tracing performance. The company has already outlined the use of AI for its FSR algorithm. That would bring them on par with NVIDIA's DLSS and Intel's XeSS technologies that have been using AI-accelerated deep learning models for years now.

AMD RDNA Generational GPU Lineup

Radon lineup Radeon RX 5000 Radeon RX 6000 Radeon RX 7000 Radeon RX 8000
GPU architecture rDNA 1 rDNA 2 RDNA 3 / RDNA 2 rDNA 4
Process node 7 nm 7 nm 5nm/6nm 5nm/3nm?
GPU family Navi 1X Navi 2X Navi 3X Navi 4X
Flagship GPU N/A Navi 21 (5120 SPs) Navi 31 (6144 SPs) Navi 41 (cancelled?)
High-end GPU Navi 10 (2560 SPs) Navi 22 (2560 SPs) Navi 32 (4096 SPs) Navi 48 (4 SEs?)
Mid-range GPU Navi 12 (2560 SPs) Navi 23 (2048 SPs) Navi 33 (2048 SPs) N/A?
Entry-tier GPU Navi 14 (1536 SPs) Navi 24 (1024 SPs) Navi 34 (1024 SPs)? Navi 44 (2 SEs?)

News Sources: Video cards, Tweak Town,

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