Skylake
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| Skylake | |
|---|---|
| Name | Skylake |
| Designer | Intel Corporation |
| Architecture | x86-64 |
| Microarchitecture | Intel Core microarchitecture |
| Introduced | 2015 |
| Sockets | LGA 1151, BGA |
| Lithography | 14 nm |
| Cores | 2–4 (consumer), up to 22 (server variants) |
| Predecessor | Broadwell (microarchitecture) |
| Successor | Kaby Lake |
Skylake is a family of Intel microarchitecture processors introduced in 2015 that succeeded Broadwell (microarchitecture) and preceded Kaby Lake. Designed by Intel Corporation for desktops, laptops, and servers, Skylake targeted improvements in performance-per-clock, power efficiency, and integrated graphics. The design was deployed across multiple product lines including Intel Core i3, Intel Core i5, Intel Core i7, and Intel Xeon variants and influenced subsequent generations from Coffee Lake (microarchitecture) to Tiger Lake.
Overview
Skylake represented a "tock" in Intel's old tick–tock cadence associated with Intel Core microarchitecture evolution and was notable within the timeline alongside Haswell (microarchitecture), Ivy Bridge, and Nehalem (microarchitecture). It was fabricated on a 14 nm process developed at Intel Fab facilities and introduced support for newer platform features that intersected with standards from PCI Express 3.0 implementers, DDR4 SDRAM adopters, and DisplayPort integrators. The family encompassed both consumer and enterprise segments sold through channels used by Dell, HP Inc., Lenovo, and Apple Inc..
Microarchitecture
Skylake revised core pipelines that trace lineage to Intel Core microarchitecture designs, with wider execution resources and enhanced branch prediction similar to enhancements seen previously in Sandy Bridge and Ivy Bridge. The design added micro-op cache features previously evolved since Haswell (microarchitecture), implemented a redesigned system agent, and updated the integrated graphics architecture derived from Intel HD Graphics lineage. It incorporated memory controller changes to support DDR4 SDRAM and retained compatibility with DDR3L SDRAM in certain SKUs, while supporting platform features coordinated with Intel Management Engine and Direct Media Interface updates.
Processors and Product Lines
Skylake shipped across multiple SKU families: mobile Intel Core U-series and Y-series for ultraportables, desktop S-series for mainstream desktops, H-series for high-performance laptops, and Intel Xeon E3/E5 families for servers and workstations. OEMs such as Microsoft Surface teams and Dell XPS divisions used Skylake SKUs in designs alongside collaborations with NVIDIA for discrete GPU pairings and with Samsung Electronics for OEM memory subsystems. Skylake also appeared in embedded platforms produced by Intel Embedded partners and in all-in-one systems marketed by HP Inc. and Lenovo.
Performance and Benchmarks
Independent benchmarking organizations including PassMark, SPEC CPU2017, and reviewers at AnandTech, Tom's Hardware, TechRadar, and The Verge measured Skylake gains in single-threaded IPC and energy efficiency versus Broadwell (microarchitecture) and Haswell (microarchitecture). Desktop Skylake SKUs showed improved performance in workloads used by Adobe Systems creative applications, Autodesk CAD tools, and gaming titles from Electronic Arts and Valve Corporation when paired with discrete GPUs from NVIDIA or AMD (company). Server-class Intel Xeon Skylake variants were evaluated in datacenter scenarios by operators such as Amazon Web Services, Google, and Microsoft Azure for virtualization and cloud-native workloads.
Power Consumption and Thermal Management
Skylake introduced power-optimizing features managed via firmware interfaces coordinated with UEFI implementations and platform controllers from Intel Corporation. Mobile SKUs emphasized low TDP operation for battery life in products by Apple Inc. and Dell, benefiting notebooks using Lithium-ion battery packs. Thermal solutions from partners such as Cooler Master, Noctua, and OEM thermal engineers targeted heat dissipation in mainstream and enthusiast platforms, and motherboard vendors including ASUS, Gigabyte Technology, and MSI provided VRM designs and BIOS options for power delivery and thermal throttling policies.
Security and Vulnerabilities
Skylake drew attention in security research communities including teams at Google Project Zero and academic labs at MIT and University of California, Berkeley for speculative execution side-channel vulnerabilities that affected multiple Intel architectures. Publicized classes of issues such as those disclosed in 2018 prompted mitigation efforts coordinated with Linux kernel maintainers, Microsoft security updates, and microcode patches from Intel Corporation. Some mitigations impacted performance in I/O-bound and system-call-heavy workloads on Skylake servers deployed by Amazon Web Services and enterprise customers.
Reception and Legacy
Reviews from publications including AnandTech, PC Gamer, Wired, and The Verge generally praised Skylake for balanced IPC improvements, platform feature set, and energy efficiency compared with immediate predecessors. Skylake's platform longevity influenced motherboard ecosystems and enterprise procurement cycles at organizations like Facebook, Twitter, and Dropbox (service), and its microarchitectural lessons fed into successors including Kaby Lake and Ice Lake (microarchitecture). Skylake remains a notable milestone in Intel Corporation's product history and in the broader evolution of x86 server and client processors.