AMD has integrated 3D V-Cache technology into their Ryzen processors to enhance the speed of 3D graphics-intensive applications, such as video games, animation, and video rendering. This technology achieves faster rendering times and overall improved performance by minimizing the amount of data transferred between the main memory and GPU.
The "3D" aspect of the X3D CPUs refers to the vertical stacking of the cache on top of the CCD, as opposed to the traditional horizontal arrangement. By stacking the cache in this manner, a larger cache size can be accommodated within the same physical space, while still maintaining fast access speeds.
On Ryzen 9 X3D parts, AMD has optimized gaming performance on a single CCD by placing the SRAM cache on a single CCD rather than both CCDs. This preserves the benefits of higher clock speeds on the secondary die, resulting in a balanced outcome for both single-threaded gaming and multi-threaded applications, without compromising clock speeds as seen in previous generations.
In previous generations, the X3D CPU was locked to overclocking and featured a lower boost speed to accommodate the new cache. Unfortunately, this affected the 5800X3D performance outside of gaming.