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Concept
Epyc
Summary
Epyc is a brand of multi-core x86-64 microprocessors designed and sold by AMD, based on the company's Zen microarchitecture. Introduced in June 2017, they are specifically targeted for the server and embedded system markets. Epyc processors share the same microarchitecture as their regular desktop-grade counterparts, but have enterprise-grade features such as higher core counts, more PCI Express lanes, support for larger amounts of RAM, and larger cache memory. They also support multi-chip and dual-socket system configurations by using the Infinity Fabric interconnect.
In March 2017, AMD announced plans to re-enter the server market with a platform based on the Zen microarchitecture, codenamed Naples, and officially revealed it under the brand name Epyc in May. That June, AMD officially launched Epyc 7001 series processors, offering up to 32 cores per socket, and enabling performance that allowed Epyc to be competitive with the competing Intel Xeon product line. Two years later, in August 2019, the Epyc 7002 'Rome' series processors, based on the Zen 2 microarchitecture, launched, doubling the core count per socket to 64, and increasing per-core performance dramatically over the last generation architecture.
In March 2021, AMD launched the Epyc 7003 'Milan' series, based on the Zen 3 microarchitecture. Epyc Milan brought the same 64 cores as Epyc Rome, but with much higher per-core performance, with the EPYC 7763 beating the EPYC 7702 by up to 22% despite having the same number of cores and threads. A refresh of the Epyc 7003 'Milan' series with 3D V-Cache named Milan-X launched on March 21, 2022, using the same cores as Epyc Milan, but with an additional 512MB of cache stacked onto the compute dies, bringing the total amount of cache per CPU to 768 MB.
On November 8, 2021, AMD unveiled the upcoming generations of AMD EPYC, also unveiling the new LGA-6096 SP5 socket that would support the upcoming generations of Epyc chips. Codenamed Genoa, the first Zen 4 based Epyc CPUs will be built on TSMC's N5 node and support up to 96 cores and 192 threads per socket, alongside 12 channels of DDR5, 128 PCIe 5.
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