Non-P models use 64 PCI-E lanes from each processor for the communication between processors. The following table lists the devices using the first generation design.Ī "P" suffix denotes support for only a single socket configuration. Features ĬPU features table Products Server First generation Epyc (Naples) In 2021, Meta Platforms selected Epyc chips for its metaverse data centers. First generation Epyc fell behind in database tasks compared to Intel's Xeon parts due to higher cache latency.
Epyc was generally found to outperform Intel CPUs in cases where the cores could work independently, such as in high-performance computing and big-data applications. Initial reception to Epyc was generally positive. Some features may require the use of additional controller chips to utilize.Ī near-infrared photograph of a delidded second gen Epyc 7702 Reception That means most features required to make servers fully functional (such as memory, PCI Express, SATA controllers, etc.) are fully integrated into the processor, eliminating the need for a chipset to be placed on the mainboard. Unlike Opteron, Intel equivalents and AMD's desktop processors (excluding Socket AM1), Epyc processors are chipset-free - also known as system on a chip. All current Epyc CPUs are equipped with up to eight channels of DDR4 at varying speeds, though next gen Genoa CPUs are confirmed by AMD to support up to twelve channels of DDR5. First generation Epyc CPUs had 128 PCIe 3.0 lanes, while second and third generation had 128 PCIe 4.0 lanes. As such, a dual socket configuration has the same number of usable PCIe lanes as a single socket configuration.
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In a dual socket configuration, 64 PCIe lanes from each CPU are allocated to AMD's proprietary Infinity Fabric interconnect to allow for full bandwidth between both CPUs. Įpyc supports both single socket and dual socket operation. Third gen Milan-X CPUs use advanced through-silicon-vias to stack an additional die on top of each of the 8 compute dies, adding 64 MB of 元 cache per die. Second and Third gen Epyc CPUs are composed of eight compute dies built on a 7 nm process node, and a large I/O die built on a 14 nm process node. Cores are symmetrically disabled on dies to create lower binned products with fewer cores but the same I/O and memory footprint. First gen Epyc CPUs are composed of four 14 nm compute dies, each with up to 8 cores. AMD EPYC CPU Codenames GenĪ delidded second gen Epyc 7702, showing the die configurationĮpyc CPUs use a multi-chip-module design to enable higher yields for a CPU than traditional monolithic dies. Bergamo will be compatible with Socket SP5, and will support up to 128 cores and 256 threads per socket. Bergamo will be based on a modified Zen 4 microarchitecture named Zen 4c, designed to allow for much higher core counts and efficiency at the cost of lower single-core performance, targeting cloud providers and workloads, compared to traditional high performance computing workloads. AMD also shared information regarding the sister-chip of Genoa, codenamed Bergamo.
Codenamed Genoa, the first Zen 4 based Epyc CPUs will be built on a TSMC 5nm process node and support up to 96 cores and 192 threads per socket, alongside 12 channels of DDR5, 128 PCIe 5.0 lanes, and Compute Express Link 1.1. On November 8th, 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.
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A refresh of the Epyc 7003 'Milan' series with 3D V-Cache named Milan-X launched March 21st, 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. 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. In March 2021, AMD launched the Epyc 7003 'Milan' series, based on the Zen 3 microarchitecture. 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. 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. 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.