Notebookcheck Logo
, , , , , ,
search relation.
, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Asus ZenBook S UX391U


Asus ZenBook S UX391U
Asus ZenBook S UX391U (ZenBook S UX391U Series)
Intel Core i7-8550U 4 x 1.8 - 4 GHz, Kaby Lake Refresh
Graphics adapter
Intel UHD Graphics 620, Core: 1150 MHz, Memory: 1066 MHz,
8192 MB 
, LPDDR3-2133, soldered
13.30 inch 16:9, 1920 x 1080 pixel 166 PPI, AUO B133HAN04.9, IPS, glossy: no
Intel Kaby Lake-U iHDCP 2.2 Premium PCH
Samsung PM961 NVMe MZVLW512HMJP, 512 GB 
, 455 GB free
Intel Kaby Lake-U/Y PCH - High Definition Audio
1 USB 3.0 / 3.1 Gen1, 2 USB 3.1 Gen2, 2 Thunderbolt, 3 DisplayPort, Audio Connections: 3.5 mm headset, 1 Fingerprint Reader
Intel Dual Band Wireless-AC 8265 (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5), Bluetooth 4.2
height x width x depth (in mm): 12.9 x 311 x 213 ( = 0.51 x 12.24 x 8.39 in)
50 Wh Lithium-Polymer, 4 cells, Battery runtime (according to manufacturer): 13.5 h
Operating System
Microsoft Windows 10 Home 64 Bit
Webcam: HD-Webcam
Additional features
Speakers: Stereo Harman Kardon, Asus SonicMaster Premium Audio System, Keyboard: Chiclet, Keyboard Light: yes, 65W PSU, Asus Mini Dock, Sleeve, McAfee Live Safe (trial), Office 365 (trial), Asus Tools, 12 Months Warranty
1.018 kg ( = 35.91 oz / 2.24 pounds), Power Supply: 222 g ( = 7.83 oz / 0.49 pounds)
1349 Euro



Average Score: 82.21% - good
Average of 7 scores (from 10 reviews)
price: 73%, performance: 87%, features: 72%, display: 75% mobility: 83%, workmanship: 94%, ergonomy: 87%, emissions: 94%

Reviews for the Asus ZenBook S UX391U

88.5% Asus ZenBook S UX391U (Core i7, FHD) Laptop Review | Notebookcheck
The ZenBook S (UX391) is a particularly light 13.3-inch laptop from Asus. It tips the scale at just 1 kg, but the manufacturer says the performance is not affected. We review the rival for the XPS 13.
60% Asus ZenBook S review: S is for Style, not for Substance
Source: It Pro English
Although the Asus ZenBook S is speedy enough to satisfy, and it looks the absolute business, there are too many flaws to recommend it, including a disappointing screen and some serious thermal issues.
Single Review, online available, Medium, Date: 11/29/2018
Rating: Total score: 60%
80% ASUS ZenBook S review: Just a decent laptop
Source: Engadget English
If you’re in the market for a traditional Windows laptop that won’t weigh you down, the ZenBook S is a solid choice. Despite its small size, it has enough power for most tasks. Battery life is a letdown, but the S is still a good option unless you need to be unplugged for a full workday at a time.
Single Review, online available, Long, Date: 11/10/2018
Rating: Total score: 80%
ASUS ZenBook S (UX391) Hands-On, Quick Review: Ultraportable A4-Sized Workhorse
Source: Unbox English
Since ASUS’ refreshed ZenBook line is headlined by key features like crazy thin bezels, Ergolift hinges, and ScreenPads, it’s not surprising that their premium ultrabook line, the ZenBook S (UX391) gets some of that love too.
Single Review, online available, Short, Date: 09/20/2018
96% ASUS ZenBook S is a success, almost perfection (Australian review)
Source: Gadgetguy English
ASUS ZenBook S follows the Buddha saying, “Aim for success, not perfection. Never give up because you will lose the ability to learn new things. Move forward with your life.
Single Review, online available, Medium, Date: 07/06/2018
Rating: Total score: 96% price: 80% performance: 100% workmanship: 100%
Asus Zenbook S first look – A ‘military grade’ Macbook rival
Source: Trusted Reviews English
The Zenbook S doesn’t have the wow factor of Asus’ other Computex releases, but from what I’ve seen it looks like a solid, ultraportable Macbook rival.
Single Review, online available, Medium, Date: 06/06/2018
Hands on: Asus ZenBook S review
Source: Techradar English
The Asus ZenBook S isn’t the world’s thinnest, most affordable or even a 100% uniquely designed laptop, but it still looks like the Ultrabook to treat yourself with right now.
Single Review, online available, Short, Date: 06/05/2018
Asus ZenBook S is the laptop you’ll actually want on your lap
Source: CNet English
Inside, the ZenBook S is packing some pretty premium specs in that thin body, including a 13.3-inch 4K display, Intel Core i7 processor, 16GB of RAM and a 1TB SSD on the top-of-the-line model.
Single Review, online available, Very Short, Date: 06/04/2018

Foreign Reviews

80% Die Besten ihrer Art – Highend-Notebooks
Source: PC Go - 12/18 German
Comparison, , Long, Date: 12/01/2018
Rating: Total score: 80% performance: 93% features: 70% display: 60% mobility: 77%
83% Asus Zenbook S, análisis y opinión
Source: Computerhoy Spanish ES→EN
Single Review, online available, Very Long, Date: 08/25/2018
Rating: Total score: 83%
88% Recensione ASUS ZenBook S
Source: Smart World Italian IT→EN
Single Review, online available, Medium, Date: 07/17/2018
Rating: Total score: 88% price: 65% features: 85% display: 80% mobility: 90%


Intel UHD Graphics 620: Integrated GPU (GT2, 24 EUs) found on some Kaby-Lake-Refresh CPU models (15 W ULV series). Technically identical to the previous Kaby-Lake GPU called HD Graphics 620.

Modern games should be playable with these graphics cards at low settings and resolutions. Casual gamers may be happy with these cards.

» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.

i5-8550U: Kaby-Lake-Refresh based low power quad-core processor. The four cores are clocked between 1.8 and 4 GHz (Turbo Boost) and support HyperThreading. The integrated GPU is clocked between 300 and 1,150 MHz. The SoC is manufactured in a 14nm+ FinFET process.» Further information can be found in our Comparison of Mobile Processsors.


Above all, this display size is used for subnotebooks, ultrabooks and convertibles. For all three types, this size is quite large. The biggest variety of subnotebooks is represented with this size.

Large display-sizes allow higher resolutions. So, details like letters are bigger. On the other hand, the power consumption is lower with small screen diagonals and the devices are smaller, more lightweight and cheaper.

» To find out how fine a display is, see our DPI List.

1.018 kg:

This weight is typical for big tablets, small subnotebooks, ultrabooks and convertibles with a 10-11 inch display-diagonal.

Asus: ASUSTeK Computer Incorporated, a Taiwanese multinational company, produces motherboards, graphics cards, optical drives, PDAs, computer monitors, notebook computers, servers, networking products, mobile phones, computer cases, computer components, and computer cooling systems. The company's 2007 revenues reached US$6.9 billion. ASUS also produces components for other manufacturers. The Eee PC initiated the netbook boom in 2008.

In the notebook sector, Asus had a global market share of about 11% from 2014-2016, making it the fourth largest laptop manufacturer. In the smartphone sector, Asus is not among the Top 5 and has only a small market share (as of 2016).

82.21%: This rating should be considered to be average. This is because the proportion of notebooks which have a higher rating is approximately equal to the proportion which have a lower rating.

» Further information can be found in our Notebook Purchase Guide.


Please share our article, every link counts!

Similar devices from a different Manufacturer

HP Envy 13-ah0005ns
UHD Graphics 620
Dell XPS 13 9370-1CNW5
UHD Graphics 620
HP Envy 13-ah0001ng
UHD Graphics 620
Sony Vaio S11-VJS1121
UHD Graphics 620
HP Spectre 13-af005nl
UHD Graphics 620
HP Spectre 13-AF000NS
UHD Graphics 620
HP ENVY 13-ad113ns
UHD Graphics 620
HP Spectre 13-af090tu
UHD Graphics 620
Dell XPS 13 9370 i7 UHD
UHD Graphics 620
HP Spectre 13-af030nd
UHD Graphics 620
HP Spectre 13-af008nc
UHD Graphics 620

Devices from a different Manufacturer and/or with a different CPU

HP Elite c1030, i7-10610U
UHD Graphics 620, Comet Lake i7-10610U
Current Prices
> Notebook / Laptop Reviews and News > Library > Asus > Asus ZenBook S UX391U
Stefan Hinum, 2018-07-18 (Update: 2018-07-18)