Again we see Specter giving something to talk about, although this time involving only AMD and its Zen 3-based Ryzen 5000 processors, which are affected in their performance by mitigations that patch security problems.
Unlike the red team, Intel solved these problems at the hardware level with its Willow Cove microarchitecture, so its Tiger Lake processors are not affected.
The Phoronix site reveals that they put three different generations of mid-range Ryzen processors to the test, these being the Ryzen 5 2600X (Zen + 12nm), Ryzen 5 3600XT (Zen2 7nm), and the Ryzen 5 5600X (Zen3 7nm).
The summary of the numerous tests carried out is that deactivating the mitigations, the Ryzen 5 5600X is 6.8% faster, while the performance of the Ryzen 5 3600XT increases by 4%, so the most affected here is the Zen 3 based processor.
While the Ryzen 5 5600X is still a very powerful processor, this does not take away from the fact that the latest CPUs from AMD are affected in terms of performance by mitigations.