Whiskey Lake (microarchitecture)

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Whiskey Lake
CreatedAugust 28, 2018; 7 months ago (August 28, 2018)
Transistors14 nm (Tri-Gate) transistors
Architecturex86-64
Instructionsx86-64, Intel 64
Extensions
SocketBGA1528
PredecessorMobile: Kaby Lake Refresh (2nd optimization)
SuccessorIce 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[edit]

  • 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[edit]

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]

CVE Description Cascade Lake Whiskey Lake,

Coffee Lake (9th gen)[12]

Coffee Lake (8th gen)
Spectre Variant 1 2017-5753 Bounds Check Bypass OS/VMM OS/VMM OS/VMM
Spectre Variant 2 2017-5715 Branch Target Injection Hardware + OS Firmware + OS Firmware + OS
Meltdown Variant 3 2017-5754 Rogue Data Cache Load Hardware Hardware Firmware
Spectre-NG Variant 3a 2018-3640 Rogue System Register Read Hardware[citation needed] Firmware Firmware
Spectre-NG Variant 4 2018-3639 Speculative Store Bypass Hardware + OS/VMM[citation needed] Firmware + OS Firmware + OS
Foreshadow Variant 5 2018-3615 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[edit]

Mobile processors[edit]

TDP for these CPUs is 15 W, but can be configurable.

Core i5-8365U and i7-8665U support Intel vPro Technology

Pentium Gold and Celeron CPUs lack AVX2 support.

Processor

branding

Model Cores

(threads)

CPU

clock rate

Turbo clock GHz

Num of cores

GPU Max GPU

clock rate

L3

cache

cTDP Memory Price
1 2 4 Up Down
Core i7 8665U 4 (8) 1.9 GHz 4.8 UHD
620
1150 MHz 8 MB 25 W 10 W DDR4-2400

LPDDR3-2133

8565U 1.8 GHz 4.6 4.5 4.1 $409
Core i5 8365U 1.6 GHz 4.1 1100 MHz 6 MB
8265U 3.9 3.9 3.7 $297
Core i3 8145U 2 (4) 2.1 GHz 3.9 3.7 N/A 1000 MHz 4 MB $281
Pentium Gold 5405U 2.3 GHz N/A UHD
610
950 MHz 2 MB - 12.5 W DDR4-2133

LPDDR3-1866

$161
Celeron 4205U 2 (2) 1.8 GHz 900 MHz $107

References[edit]

  1. ^ "New 8th Gen Intel Core Processors Optimize Connectivity, Great Performance, Battery Life for Laptops | Intel Newsroom". Intel Newsroom. Retrieved 2018-08-28.
  2. ^ a b 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.