AMD has released the 3D V-Cache Optimizer driver for its Ryzen X3D processors, allowing users to optimize performance by choosing between cache size and frequency. The new feature, available on Linux 6.13+, enables users to communicate their preference through a sysfs interface, which affects CPU core reordering.
The Ryzen 9 9950X3D is the first product to utilize this new driver, and AMD has provided default settings that favor higher frequency over larger cache sizes. However, users can easily change this behavior by writing “cache” to the relevant sysfs interface, which prioritizes using the CCD with the larger cache.
To test the impact of this feature, we ran a series of benchmarks on the Ryzen 9 9950X3D, first at its default settings and then again with the “- X3D Optimizer cache” setting. The results show a noticeable boost in performance when the “cache” mode is used, demonstrating the effectiveness of AMD’s 3D V-Cache Optimizer driver in optimizing system performance.
Source: https://www.phoronix.com/review/amd-3d-vcache-optimizer-9950x3d