Xeon Scalable Processors (Skylake)

Xeon Scalable Processors (Skylake)
Name	Xeon Scalable Processors (Skylake)
Code name	Skylake-SP
Produced	2017
Designer	Intel
Arch	Skylake
Socket	LGA 3647
Predecessor	Xeon E5 v4 (Broadwell-EP)
Successor	Xeon Scalable (Cascade Lake)

Xeon Scalable Processors (Skylake). The Xeon Scalable Processors, codenamed Skylake-SP, are a family of server and workstation CPUs introduced by Intel in July 2017. They marked a significant architectural shift from the prior Xeon E5 and Xeon E7 lines, introducing a new tiered naming scheme and a mesh interconnect. These processors were designed for demanding workloads in data centers, high-performance computing, and enterprise environments.

Overview

The launch of the Xeon Scalable family represented a major strategic realignment for Intel's data center group, consolidating multiple product lines under a single scalable brand. Announced at an event in San Francisco, the processors were positioned to address the evolving needs of modern cloud infrastructure and artificial intelligence. The platform was supported by a new chipset and the Purley platform, which included support for Intel Optane persistent memory. This generation faced competitive pressure from AMD's resurgent Epyc processor line based on the Zen architecture.

Architecture

The microarchitecture is based on the Skylake core but implemented for the server market with a fundamental change from a ring bus to a mesh interconnect. This mesh topology improved core-to-core and core-to-memory latency in many-core configurations. The processors were built on a 14nm manufacturing process and supported the AVX-512 instruction set, enhancing performance for scientific and analytical workloads. Key architectural features included integrated Intel QuickAssist Technology and improved security capabilities like Intel Software Guard Extensions. The memory controller supported six channels of DDR4 memory and introduced official support for Intel Optane DC Persistent Memory.

Processor list

The family was segmented into four tiers: Platinum, Gold, Silver, and Bronze, with Platinum offering the highest core counts and features. Notable high-end models included the Xeon Platinum 8180, a 28-core part, and the Xeon Platinum 8176. The Gold series contained many mainstream server parts, such as the Xeon Gold 6154, while Silver and Bronze were targeted at entry-level and optimized workloads. The lineup also included a "M" suffix for models supporting larger memory capacities, such as the Xeon Platinum 8160M. All processors utilized the LGA 3647 socket and were part of the Purley platform.

Performance and features

Performance was significantly increased over the prior Broadwell-EP generation, particularly in floating-point and vectorized workloads due to AVX-512. The mesh interconnect generally provided better scalability beyond 20 cores compared to the older ring design. The platform introduced support for Intel Optane DC Persistent Memory, a technology developed in partnership with Micron Technology. Other notable features included enhanced reliability via Intel Run Sure Technology and improved virtualization performance. These processors powered many top supercomputers on the TOP500 list, including systems at Lawrence Livermore National Laboratory.

Market positioning and reception

Intel positioned the Xeon Scalable Processors as a comprehensive solution for the modern data center, from cloud service providers like Amazon Web Services to private enterprise deployments. The reception from the industry was generally positive regarding the performance uplift and new feature set. However, the launch coincided with heightened competition from AMD's Epyc processors, which offered high core counts, impacting Intel's market share and pricing strategy. Major system integrators like Dell EMC, HPE, and Lenovo quickly adopted the platform for their server lines.

Successors and variants

The direct successor to this family was the Xeon Scalable (Cascade Lake) series, which refined the 14nm process and introduced hardware mitigations for vulnerabilities like Spectre and Meltdown. A variant using the same architecture but for single-socket workstations was marketed as the Xeon W-2100 and Xeon W-3100 series. Later generations would transition to new microarchitectures like Ice Lake-SP and adopt a 10nm process. The scalable branding and tiered naming scheme continued through these subsequent generations from Intel.

Category:Intel microprocessors Category:Server hardware Category:2017 in computing