Skylake (microarchitecture)

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L1 cache 128 KB
L2 cache 512 KB
L3 cache 12 MB
Predecessor Haswell (tock)
Broadwell (tick)
Successor Cannonlake (tick)

Skylake is the codename for a processor microarchitecture to be developed by Intel as the successor to the Broadwell architecture.[1] Skylake will use the 14 nm manufacturing process.[2]

Skylake will come in four variants, namely Skylake-S (SKL-S), Skylake H (SKL-H), Skylake U (SKL-U), and Skylake Y (SKL-Y). The H, U and Y variants will be manufactured in ball grid array (BGA) packaging, while the S variant will be manufactured in land grid array (LGA) packaging.[3] An important redesign in Skylake will be that the fully integrated voltage regulator (FIVR), which was introduced with Haswell processors, will be abandoned and no longer included on the die.[4]

The Platform Controller Hub (PCH) will be integrated onto the die for Skylake's H, U and Y variants, effectively following a system-on-chip (SoC) design layout, while the S variant will remain as a two-chip design. On the variants which will use the PCH, Direct Media Interface (DMI) 2.0 will be replaced by DMI 3.0, which promises speeds of up to 8 GT/s. Variants U and Y will support one DIMM slot per channel, while variants H and S will support two DIMM slots per channel.[3] All processors at the time of release will have their clock multipliers locked.[5]

Skylake will be used in conjunction with Intel 100 Series chipsets, also known as Sunrise Point.[6]



Multiple combinations of integrated L4 eDRAM cache will be available with various Skylake configurations. Some of the available models will have configurable thermal design power (cTDP); for example, Skylake-S (SKL-S) processors will be available in two TDP variants, one around 35 W and the other around 65 W. Skylake-S processors will also have support for both DDR3 and DDR4 SDRAM.[3]

The following table details the announced Skylake configurations, as of June 2014:[3]

Variant Cores Graphics Memory eDRAM TDP
SKL-Y-1 2 GT2 LPDDR3 1600 MHz N/A 4 W
SKL-U-1 2 GT2 LPDDR3 1600 MHz N/A 15 W
SKL-U-2 2 GT3e LPDDR3 1600 MHz 64 MB 28 W
SKL-H-1 4 GT2 DDR4 2133 MHz N/A 35 W
SKL-H-2 4 GT4e DDR4 2133 MHz 128 MB 45 W
SKL-S-1 2 GT2 DDR4 2133 MHz or DDR3L/DDR3L-RS 1600 MHz N/A 35–65 W
SKL-S-2 4 GT2 DDR4 2133 MHz or DDR3L/DDR3L-RS 1600 MHz N/A 95 W
SKL-S-3 4 GT4e DDR4 2133 MHz or DDR3L/DDR3L-RS 1600 MHz 64 MB 35–65 W


The main article for this category is Intel Tick-Tock.

See also[edit]


  1. ^ Demerjian, Charlie. "After Intel's Haswell comes Broadwell". Retrieved 2012-01-04. 
  2. ^ "Intel Presentation: 22nm Details" (PDF). Retrieved 2012-01-04. 
  3. ^ a b c d Pirzada, Syed Muhammad Usman (27 June 2014). "Massive Intel 14nm Skylake Leak – Multiple eDRAM Configurations and Desktop Variant to have Configurable TDP". WCCFTech. WCCFTech Prvt. Ltd. Retrieved 28 June 2014. 
  4. ^ Pirzada, Syed Muhammad Usman (5 June 2014). "Intel to Abandon the Internal Voltage Regulator (IVR) with Skylake Microarchitecture". WCCFTech. WCCFTech Prvt. Ltd. Retrieved 28 June 2014. 
  5. ^ Shvets, Gennadiy (2014-05-25). "Intel Skylake desktop CPUs to launch in Q2 2015". Cpu-World. Retrieved 2014-05-25. 
  6. ^ "Intel Core "Skylake" CPUs Accompanied by 100-series Chipset". techPowerUp. Retrieved 2014-05-08. 
  7. ^ "Intel's Cannonlake 10nm Microarchitecture is Due For 2016 - Compatible On Union Bay With Union Point PCH". 2014-06-06. Retrieved 2014-06-15. 
  8. ^ "Intel 14nm Skylake Desktop 'Sky Bay" Platform Detailed - TDPs For DT, H-Series, U-Series, Y-Series Unveiled, Quad Core With GT4e GPU Has 95W TDP". 2014-06-05. Retrieved 2014-06-09. 
  9. ^ a b "Intel Skylake Processors To Launch in 2H 2015 - Compatible With LGA 1151 Socket and Z170 Chipset, Will Feature DDR3 / DDR4 Memory Support". 2014-06-04. Retrieved 2014-06-09. 
  10. ^ Shilov, Anton (2012-04-04). "Intel to Start DDR4 Usage with Server Platforms in 2014.". X-bit laboratories. Retrieved 2013-10-05. 
  11. ^ Worrel, Jon (2012-04-04). "Intel to introduce DDR4 memory with Haswell-EX server platform". Fudzilla. Retrieved 2013-10-05. 
  12. ^ a b Iyer, Tarun (2013-07-03). "Report: Intel Skylake to Have PCIe 4.0, DDR4, SATA Express". Tom's Hardware. Retrieved 2013-10-05. 
  13. ^ Reynolds, Sam (2013-11-07). "New details on Intel's upcoming Skylake processor". Retrieved 2014-05-08. 
  14. ^ Kirsch, Nathan. "Intel 2015 Platform Roadmap Shows Skylake CPUs, 100 Series Chipset and DDR4". Legit Reviews. Retrieved 2014-05-08. 
  15. ^