Don’t use Ryzen Master Eco Mode with Ryzen 9 7900X 7950X CPUs until you read this
3DMARK CPU Benchmark
This may be our clearest look at how Eco Mode impacts the performance of AMD’s Ryzen 9 7950X. We see that single-threaded, dual-core performance, and quad-core performance are practically identical in all modes, but in higher threaded workloads, all-core clock speeds drop and performance suffers. This is especially true in this benchmark’s 16-thread and all-threads test.
With this benchmark result in mind, it makes sense why our gaming results look the way they do. Games typically benefit from high levels of single-threaded performance and rarely benefit from having access to more than eight CPU cores. For gamers, Eco mode on AMD’s Ryzen 9 7950X will have a minimal impact on performance.