ASUS Announces Its Most Prestigious ZenBook Yet, The UX391 Zenbook S

Zenbook S UX391

UX391 Zenbook S KEY POINTS 

  • The ultimate ultraportable: The UX391 is only 9mm-thin, 1kg-light near-A4-size metal unibody and with MIL-STD-410G military-grade toughness for dependable reliability anywhere
  • Elegant craftsmanship: Precision-crafted in new Deep Dive Blue or Burgundy Red colors, with Rose Gold diamond-cut details and iconic spun-metal finish
  • Designed for ultimate comfort: New ErgoLift hinge design with 5.5° keyboard tilt for ultimate typing comfort, improved cooling airflow and enhanced audio
  • All-day performance: Up to 4K UHD NanoEdge display, 8th Gen Intel Core CPUs, up to 1TB PCIe SSD, up to 5hrs battery life, Thunderbolt 3 connectivity


Manila, Philippines, June 5, 2018 — ASUS today announced ZenBook S (UX391), a premium 13.3-inch ultraportable laptop that not only delivers effortless portability, powerful performance and no-compromise connectivity for discerning on-the-go users, but is also tested to meet military-grade MIL-STD-810G durability standards. This remarkable laptop has been honored with both the Best Choice of the Year and Best Choice Golden Award at Computex 2018.

With an ultrathin 12.9mm profile and ultralight 1kg[i] all-metal unibody, the sophisticated ZenBook S is finished in prestigious Deep Dive Blue or elegant Burgundy Red with Rose Gold diamond-cut edges, complete with the iconic Zen-inspired spun-metal finish for a luxurious look and feel.

The ZenBook S UX391 incorporates the innovative new ErgoLift hinge that automatically tilts the keyboard by 5.5° for the ultimate typing comfort: the raised chassis also improves airflow and enhances audio performance.

Powered by 8th Generation Intel® Core™ processors and a superfast PCIe® x4 SSD, ZenBook S also features up to a 4K UHD NanoEdge touchscreen, and delivers up to 13.5 hours[ii] battery life for all-day performance. For ultrafast connectivity, two of the three USB Type-C™ (USB-C™) ports support Thunderbolt™ 3. ZenBook S features Amazon Alexa support[iii] for easy voice-controlled assistance.

Zenbook S UX391
Zenbook S UX391

The ultimate ultraportable

Seasoned travelers will appreciate the way ZenBook S, with its 12.9mm-thin, 1kg-light all-metal unibody, slips effortlessly into any bag. The NanoEdge slim-bezel display and premium materials allow the reduction of every dimension and weight to the minimum, creating a masterpiece of ultraportable design.

The Zenbook S introduces two prestigious new color options, each complemented by contrasting diamond-cut Rose Gold edge highlights created using a two-phase anodizing process that’s normally reserved for jewelry or luxury timepieces. Inspired by the magical moment at dawn when the golden rays of the sun first illuminate the ink-blue sky, the luscious Deep Dive Blue finish gives ZenBook S a sublime, understated beauty. The distinctive and supremely elegant Burgundy Red color reflects the breathtaking beauty of a sky turned deep red at sunset: it’s an awe-inspiring modern shade that reflects passion, sophistication, and individuality. Both color options feature the iconic Zen-inspired spun-metal finish on the lid, a design feature that’s created using a complex 40-step manufacturing process, and which is exclusive to the ZenBook Series.

It  is not only sophisticated and elegant, but it’s incredibly tough too: it meets the ultra-demanding MIL-STD 810G military standard for reliability and durability, undergoing a punishing test regime that includes extended tests for operation in harsh environments including extreme altitudes, temperatures and humidity. It has also passed ASUS internal laptop tests that far exceed the standards set by the industry.


Designed for ultimate comfort

For outstanding ergonomics, ZenBook S incorporates the new ErgoLift hinge mechanism, an innovative design that raises and tilts the keyboard by 5.5° — the optimum angle for comfortable typing. With a maximum opening angle of 145°, ZenBook S opens wider than most laptops too, so users have more freedom to choose the best screen angle. And when ZenBook S is closed, the ErgoLift mechanism is completely hidden, so it doesn’t affect the sleek profile.

When the ErgoLift hinge mechanism tilts the keyboard, it also creates an important extra ventilation space that allows more airflow around the underside of the chassis. With this improved ventilation, ZenBook S keeps its cool even when under heavy load.

The extra space underneath ZenBook S created by the ErgoLift hinge has yet another benefit: it allows the powerful Harmon Kardon audio system to work at its best, delivering clearer sound with improved bass response.

Zenbook S UX391
Zenbook S UX391
All-day performance

Theis premium laptop is built to get things done as quickly and efficiently as possible, with no fuss or drama. The latest up to 8th Gen Intel® Core™ i7 processor, up to 16GB of fast 2133MHz LPDDR3 RAM and up to a 1TB PCIe® 3.0 x4 SSD allow users to enjoy smooth and responsive performance whatever they’re doing. For maximum sustained performance, ZenBook S uses an uprated cooling system incorporating state-of-the-art components, including an innovative liquid-crystal-polymer fan impeller with 71 blades — an increase of 40% over previous designs — housed in an advanced 3D-curved aerodynamic shroud that can move 13.4% more air than before. With this cooling system, ZenBook S runs up to 5°C cooler than previous ZenBook models.

A laptop as beautiful as ZenBook S deserves equally beautiful visuals, so it’s fitted with an up to 4K UHD NanoEdge touchscreen[iv] with a wide 72% NTSC color gamut for breathtakingly-lifelike colors and detail. The bezel width has been slimmed even further — to just 5.9mm — to give an amazing 85% screen-to-body ratio for even more immersive visuals.

For all-working-day autonomy, ZenBook S uses a high-capacity battery that lasts up to 13.5 hours2, with fast-charge technology that recharges a flat battery to 60% capacity in as little as 49 minutes.

No-compromise connectivity is essential in an ultraportable laptop. ZenBook S delivers the ultimate speed of Thunderbolt 3 in two of its three USB-C ports, and all three ports support fast charging, data transfers and display connectivity. And for desktop-grade connectivity, users can simply connect the handy ASUS Mini Dock[v].

Amazon Alexa support gives users a smart new way to get things done on their laptop, using just their voice. Whatever the task — entertainment, scheduling meetings, looking up information, controlling a smart home and much more — Alexa is instantly available to help.





ASUS ZenBook S (UX391) will be available from June 2018 in COUNTRIES from PLACES. Please contact your local ASUS representative for further information.

UX391UA-EA011T 13″ 4K IPS i7-8550 16G 512G PCIE Shared Y  Y 99,995
UX391UA-EA040T 13″ 4K IPS i7-8550 8G 256G SSD Shared Y  Y 84,995
UX391UA-EG020T 13″ FHD IPS i5-8250 8G 256G SSD Shared N  Y 69,995
UX391UA-ET082T (RED) 13″ FHD IPS i5-8250 8G 256G SSD Shared N  Y 69,995



ASUS ZenBook S (UX391)


CPU Intel® Core™ i7-8550U processor

Intel® Core™ i5-8250U processor

Display 13.3″ LED-backlit 4K UHD (3840 x 2160) 16:9 glossy touchscreen (Deep Dive Blue only)

13.3″ LED-backlit Full HD (1920 x 1080) 16:9 anti-glare non-touch display

5.9mm-thin bezel with 85% screen-to-body ratio

Wide 100% Adobe RGB color gamut

178° wide-view technology

ASUS Eye Care technology for up to 30% blue-light reduction

Operating system Windows 10 Home
Main memory 8GB / 16GB 2133MHz LPDDR3 onboard
Storage Up to 512GB PCIe® 3.0 x4 SSD
Connectivity Bluetooth® 4.2
Camera HD webcam
I/O ports 2 x USB 3.1 Gen 2 Type-C™ (Thunderbolt™ 3)

1 x USB 3.1 Gen 1 Type-C™

All three USB ports support fast charging, data transfers and display connectivity.

1 x Audio combo jack

Audio High-quality stereo speakers (with smart amplifier)

Harman Kardon-certified ASUS SonicMaster Premium audio system

Battery 50Wh lithium-polymer
AC adapter Output: 19V, 150W   Input: 100V-240V AC, 50Hz/60Hz
Dimensions 311 x 213 x 12.9mm
Weight With anti-glare display: Approx. 1kg

With glossy display: Approx. 1.05kg




About ASUS

ASUS is one of Fortune magazine’s World’s Most Admired Companies, and is dedicated to creating products for today and tomorrow’s smart life. Our comprehensive portfolio includes Zenbo, ZenFone, ZenBook and a range of IT devices and components, along with AR, VR and IoT. ASUS employs more than 16,000 people worldwide and over 5,000 world-class R&D talents. Driven by innovation and committed to quality, the company won 4,511 awards and earned approximately US$13 billion of revenue in 2017.


[i] Weight may vary according to specifications and configuration

[ii] Battery life test configuration: Intel® Core™ i5-8250U, 8GB RAM, Full HD display, 256GB SATA SSD. Battery tests conducted by ASUS in December 2017 using the MobileMark® 2014 Office Productivity scenario. Test settings: Wi-Fi enabled, display brightness set to 71%. Actual battery life may vary depending on product configuration, usage, operational conditions and power management settings. Battery life will decrease over the lifetime of the battery

[iii] Amazon Alexa support varies according to country and territory. Currently, it is only available in the United States.

[iv] Touchscreen models only

[v] Included accessories vary according to country and territory

[vi] Specifications, content and product availability are all subject to change without notice and may differ from country to country. Actual performance may vary depending on applications, usage, environment and other factors. Full specifications are available at