All first generation Epyc processors are composed of four eight-core Zeppelin dies (the same die as found in Ryzen processors) in a multi-chip module, with the varying product core counts produced by symmetrically disabling cores of each core complex on each Zeppelin die. Each server chip supports 8 channels of memory and 128 PCIe 3.0 lanes, of which 64 lanes from each are used for CPU-to-CPU communication through Infinity Fabric when installed in a dual-processor configuration. In multi-processor configurations, two Epyc CPUs communicate via AMD's Infinity Fabric. The platform includes one- and two-socket systems. The Zen 3 based Epyc microarchitecture is codenamed "Milan". Two years later, in August 2019, the Epyc 7002 series processors based on the Zen 2 microarchitecture released, bringing much better performance and double the cores compared to their predecessors. That June, AMD officially launched Epyc by releasing the Epyc 7001 series processors. In March 2017, AMD announced a server platform based on the Zen microarchitecture, codenamed Naples, and officially revealed it under the brand name Epyc in May. 5.2.1 First generation Epyc (Snowy Owl).
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