AMD shared new technical details about the RDNA 4 architecture at the Hot Chips 2025 event. In addition to the previously introduced optimized compute units and advanced AI integration, the new information highlights the architecture’s modular SoC structure and flexible scalability.

The New RDNA 4 Architecture Arrives

According to the information shared, the RDNA 4 architecture is designed with a modular SoC structure that enables various GPU configurations for different segments. This approach allows AMD to develop a wide range of products, from smaller GPUs like the Navi 44 to high-end models like the Navi 48, based on the same core architecture.

On the memory side, AMD has introduced new compression and data processing algorithms to reduce bandwidth requirements. These hardware techniques provide up to a 15% increase in raster performance, up to a 25% reduction in fabric bandwidth, and lower power consumption without any software intervention. AMD also noted that despite the low-power advantages of LPDDR memory, its bandwidth and package size make it an unsuitable option for graphics cards.

The new modular architecture also offers flexible solutions for security and power management. Different authorization levels can be assigned to controllers, and RAS (Reliability, Availability, Serviceability) technologies are integrated directly into the components.

This approach is used to varying degrees in both datacenter-focused Instinct GPUs and Radeon products. AMD currently has four Navi 48 and three Navi 44 SKUs. However, RDNA 4’s modular structure allows for future configurations.