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Asus Zenbook S UX391UA-EG022T


Asus Zenbook S UX391UA-EG022T
Asus Zenbook S UX391UA-EG022T (Zenbook S Series)
Intel Core i7-8550U 4 x 1.8 - 4 GHz, Kaby Lake Refresh
Graphics adapter
16 GB 
13.30 inch 16:9, 1920 x 1080 pixel 166 PPI, glossy: yes
1 USB 3.0 / 3.1 Gen1, 2 DisplayPort, Card Reader: undefined
802.11 a/b/g/n/ac (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5/), Bluetooth 4.2
height x width x depth (in mm): 13 x 311 x 213 ( = 0.51 x 12.24 x 8.39 in)
50 Wh
Operating System
Microsoft Windows 10 Home 64 Bit
Additional features
Keyboard Light: yes
1.1 kg ( = 38.8 oz / 2.43 pounds) ( = 0 oz / 0 pounds)



Average Score: 75.5% - good
Average of 4 scores (from 7 reviews)
price: - %, performance: 80%, features: - %, display: - % mobility: 70%, workmanship: 80%, ergonomy: - %, emissions: - %

Reviews for the Asus Zenbook S UX391UA-EG022T

75% Asus ZenBook S UX391UA review:
Source: CNet English version
Subtly stylish and durable and with strong performance to back it up, the Asus ZenBook S UX391U is a fine ultraportable if you spend more time working in coffee shops than an office.
Single Review, online available, Long, Date: 09/11/2018
Rating: Total score: 75% performance: 80% mobility: 70% workmanship: 80%
80% Asus ZenBook S (UX391UA)
Source: PC Mag English version
From its chic dark-blue design to its comfortable tilted keyboard and crisp 4K display, the Asus ZenBook S represents a good deal on a good-looking ultrabook.
Single Review, online available, Long, Date: 09/04/2018
Rating: Total score: 80%
Asus ZenBook Pro 15, ZenBook S and ZenBook 13 First Impressions
Source: The Mobile Indian English version
To conclude, the laptops come loaded with pretty interesting specifications. The ZenBook Pro 15 gives a stiff competition to MacBook Pro 15, though it features the similarly-inspired Touch Bar in select MacBook Pro models. The ZenBook S and ZenBook 13 are the ones that will face a stiff competition from the brands like Lenovo, HP, Acer and Dell.
Comparison, online available, Short, Date: 08/14/2018
70% Asus ZenBook S UX391UA Review
Source: Laptop Mag English version
The Asus ZenBook S' gorgeous 4K display, innovative design and elegant chassis make it well worth its reasonable price.
Single Review, online available, Long, Date: 08/02/2018
Rating: Total score: 70%

Foreign Reviews

Recensione Asus ZenBook S: un chilogrammo di metallo blu e oro
Source: Italian IT→EN version
Positive: Good ergonomy; metal case; solid workmanship; good cooling and silent system; high autonomy. Negative: Poor display; overheats while using.
Single Review, online available, Long, Date: 07/11/2018
77% Stylowy i smukły czy szybki? Test ultrabooka Asus ZenBook S
Source: Komputerswiat Turkish PL→EN version
Single Review, online available, Short, Date: 09/01/2018
Rating: Total score: 77%
Обзор имиджевого ноутбука Asus ZenBook S UX391UA для бизнес-пользователей
Source: Ixbt RU→EN version
Positive: Slim size; light weight; stylish design; nice ergonomy; excellent display; fast fingerprint sensor.
Single Review, online available, Very Long, Date: 07/10/2018


Model: I think it is fair to say that if MSI is kind of the best in the gaming laptops (as there are lots of other good competitors), Asus is kind of the best in the ultrabook segment (need to consider Dell XPS, Lenovo Thinkpad models as well).

So, the Zenbook series is what I have in front of me. Specifically, the UX391. Why do I have it today? A few reasons. First, weight. It only weighs 1.1 Kg. Can you believe it? Think about the mobility. While carrying whether you have a notebook sleeve or keep it in your backpack, you would not even notice it is there. Secondly, the Intel 8th Gen. i7 CPU. Oh my. Third, 16 GB of RAM. What else can be there? Oh, I know. A touch screen, 4K resolution, Asus Pen, USB dock, Thunderbolt 3 and the list goes on. Any disadvantages? Well, I can only think of DDR3 2133 MHz RAM. That's a bit disappointing, but I have not seen a model from Asus that has utilized DDR4 RAM in this segment. I change my words, it is really disappointing.

Apart from that, the reason why I picked this model is because of its potential. It literally targets people that are looking for mobility. But do you need the touch screen when the design is not convertible? Flipbook S series has models with specific configuration and they have 360 degree hinges, which makes more sense with touch screen. For me I would have omitted the touchscreen and go for another SKU with a regular screen.

As someone who does lots of typing, doing development on the side, opening tons of software at the same time, this beauty is a beast. I do not feel the need to talk about keyboard, quality of the case etc. They are all top notch.

Here is the thing, beauty comes with a cost, in the literal meaning. UX391 is not cheap and not sure if it is for everyone. If mobility is your thing and you do not mind extra 150 grams or so you have the option to go for Dell XPS 13 models and if you add another 250 grams to that there you have HP's Elitebook 840 G5.

When there are other options to pick, it becomes harder to make a decision. If the money is not a problem, Asus and Dell are the picks to go. If your budget is a bit tight, then you can go for HP. Even with Dell and Asus, I am not sure if 4K is really necessary. It is better to find the models first and try from first hand before making a purchase online.

Hands-on article by Ümit Yılmaz Güneş

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.


There are hardly any tablets in this display size range anymore. For subnotebooks, on the other hand, it is the standard format.

The advantage of subnotebooks is that the entire laptop can be small and therefore easily portable. The smaller display also has the advantage of requiring less power, which further improves battery life and thus mobility. The disadvantage is that reading texts is more strenuous on the eyes. High resolutions are more likely to be found in standard laptops.

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

Asus: ASUSTeK Computer Inc. is a major Taiwanese computer hardware manufacturer based in Taipei, founded in 1989. Under the Asus brand name, the company manufactures a wide range of products, including laptops, desktops, motherboards, graphics cards, monitors, smartphones and networking equipment, complete systems and PC components for end users.

Under the ROG (Republic of Gamers) brand name, ASUS manufactures gaming laptops known by gamers for their powerful specifications, dedicated graphics cards, high refresh rate displays and advanced cooling systems.

Beyond gaming, a wide range of notebooks are offered for different needs and budgets, from ultra-slim and lightweight ultrabooks to versatile 2-in-1 convertibles and budget-friendly options. In 2023, Asus had a 7% global market share of the PC market.

Customer satisfaction with ASUS notebooks concerns performance, the features, and the good price-performance ratio of ASUS notebooks. However, as with any brand, there are occasional reports of problems such as overheating, driver compatibility, or build quality issues.

75.5%: This rating is not earth-shattering. This rating must actually be seen as average, since there are about as many devices with worse ratings as better ones. A purchase recommendation can only be seen with a lot of goodwill, unless it is about websites that generally rate strictly.

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


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Current Prices
> Notebook / Laptop Reviews and News > Library > Asus > Asus Zenbook S UX391UA-EG022T
Stefan Hinum, 2018-08- 3 (Update: 2018-08- 3)