Speaking about the advantages of Zen architecture, AMD Senior Vice President Jim Anderson admitted that the key to effective performance improvement as the number of cores in the processors increases is the high-speed interface of Infinity Fabric. If it did not exist, then it would not be possible to scale the performance "almost linearly" as the number of processor cores increases.
By the way, from the previous speeches of AMD CEO Lisa Su , we know that she considers it advantageous to produce small processor chips. It is the high-speed interface Infinity Fabric that allows to combine four crystals on one substrate of the EPYC (Naples) processor in eight cores on each one, without serious, as it should be understood from the words of Jim Anderson, threat to performance.
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