Whiskey Lake (microarchitecture)

Whiskey Lake
Transistors 14 nm (Tri-Gate) transistors
Architecture x86-64
Instructions x86-64, Intel 64
Extensions
Socket BGA1528
Predecessor Mobile: Kaby Lake Refresh (2nd optimization)
Successor Ice Lake (Architecture)
Brand name(s)
    • Core i3
    • Core i5
    • Core i7

Whiskey Lake is Intel's codename for the third 14 nm Skylake process-refinement, following Kaby Lake Refresh and Coffee Lake. Intel announced low power mobile Whiskey Lake CPUs availability on August 28, 2018.[1][2] It has not yet been advertised whether this CPU architecture contains hardware mitigations for Meltdown/Spectre class vulnerabilities—various sources contain conflicting information.[3][4][2][5] Unofficially it was announced that Whiskey Lake has hardware mitigations against Meltdown and L1TF while Spectre V2 requires software mitigations as well as microcode/firmware update.[6][7][8][9]

Architecture changes compared to Kaby Lake Refresh

  • 14++ nm process, same as Coffee Lake
  • Increased turbo clocks (300–600 MHz)
  • 14 nm PCH
  • Native USB 3.1 gen 2 support (10 Gbit/sec)
  • Integrated 802.11ac 160 MHz Wi-Fi and Bluetooth 5.0
  • Intel Optane Memory support

Spectre and Meltdown mitigations in modern Intel CPU architectures

The 8th generation Coffee Lake architecture in this table also applies to a wide range of previously released Intel CPUs, not limited to the architectures based on Intel Core, Pentium 4 and Intel Atom starting with Silvermont.[10][11]

Description Cascade Lake Whiskey Lake,

Coffee Lake (9th gen)[12]

 Coffee Lake (8th gen)
Spectre Variant 1 Bounds Check Bypass OS/VMM OS/VMM OS/VMM
Spectre Variant 2 Branch Target Injection Hardware + OS Firmware + OS Firmware + OS
Meltdown Variant 3 Rogue Data Cache Load Hardware Hardware Firmware
Meltdown Variant 3a Rogue System Register Read Firmware Firmware Firmware
Variant 4 Speculative Store Bypass Firmware + OS Firmware + OS Firmware + OS
Variant 5 L1 Terminal Fault Hardware Hardware Firmware

* Hardware mitigations impose close to zero performance loss, while firmware and/or OS mitigations might incur quite a significant performance loss (depending on workload).

List of Whiskey Lake CPUs

Mobile processors

Processor

branding

 Model Cores

(threads)

 CPU

clock rate

 Turbo clock GHz

Num of cores

 GPU Max GPU

clock rate

 L3

cache

 TDP cTDP Price
1 2 4 Up Down
Core i7 8565U 4 (8) 1.8 GHz 4.6 ? ? UHD 620 1150 MHz 8 MB 15 W 25 W 10 W $409
Core i5 8265U 1.6 GHz 4.1 ? ? 1100 MHz 6 MB $297
Core i3 8145U 2 (4) 2.1 GHz 3.9 ? - 1000 MHz 4 MB $281

References

  1. ↑ "New 8th Gen Intel Core Processors Optimize Connectivity, Great Performance, Battery Life for Laptops | Intel Newsroom". Intel Newsroom. Retrieved 2018-08-28.
  2. 1 2 Cutress, Ian. "Intel Launches Whiskey Lake-U and Amber Lake-Y: New MacBook CPUs?". Retrieved 2018-08-28.
  3. ↑ "Intel launches Whiskey Lake-U and Amber Lake-Y CPUs with focus on enhanced mobile connectivity". Notebookcheck. Retrieved 2018-08-28.
  4. ↑ "Intel launches Whiskey and Amber Lakes: Kaby Lake with better Wi-Fi, USB". Ars Technica. Retrieved 2018-08-28.
  5. ↑ "Intel Launches Whiskey Lake And Amber Lake CPUs for Laptops". Tom's Hardware. 2018-08-28. Retrieved 2018-08-28.
  6. ↑ "Ashraf Eassa on Twitter". Twitter. Retrieved 2018-08-29.
  7. ↑ "Ian Cutress on Twitter". Twitter. Retrieved 2018-08-29.
  8. ↑ https://www.anandtech.com/show/13301/spectre-and-meltdown-in-hardware-intel-clarifies-whiskey-lake-and-amber-lake
  9. ↑ https://www.tomshardware.com/news/whiskey-lake-mitigations-in-silicon-intel,37723.html
  10. ↑ "INTEL-SA-00088". Intel. Retrieved 2018-09-01.
  11. ↑ "INTEL-SA-00115". Intel. Retrieved 2018-09-01.
  12. ↑ online, heise. "Intel Core i9-9900K mit 8 Kernen und 5 GHz für Gamer". heise online (in German). Retrieved 2018-10-09.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.