ASUS ZenBook S UX391UA specs, features, and analysis

Here's what you need to know about 2018 ASUS ZenBook S UX391UA including price, display info, CPU, RAM, storage, battery, and more.

ASUS ZenBook S UX391UA image

ASUS ZenBook S UX391UA

Availability

ASUS ZenBook S UX391UA
Released2018
ASUS ZenBook S UX391UA Price
ASUS ZenBook S UX391UA-XB71-R Ultra-thin and light 13.3-inch Full HD Laptop, Intel Core i7-8550U, 8GB RAM, 256GB M.2 SSD, Windows 10 Pro, FP Sensor, Thunderbolt, Burgundy Red
ASUS ZenBook S UX391UA-XB71-R Ultra-thin and light 13.3-inch Full HD Laptop, Intel Core i7-8550U, 8GB RAM, 256GB M.2 SSD, Windows 10 Pro, FP Sensor, Thunderbolt, Burgundy Red
By ASUS
$549.99
$1,199.99 54% OFF
ASUS Zenbook S 13 OLED Laptop, 13.3” OLED 3K 60Hz Display, Intel Evo Certified, Intel Core Ultra 7 155U CPU, Intel Graphics, 32GB RAM, 1TB SSD, Windows 11 Pro, Basalt Gray, UX5304MA-XS76
ASUS Zenbook S 13 OLED Laptop, 13.3” OLED 3K 60Hz Display, Intel Evo Certified, Intel Core Ultra 7 155U CPU, Intel Graphics, 32GB RAM, 1TB SSD, Windows 11 Pro, Basalt Gray, UX5304MA-XS76
By ASUS
$1,399.99
ASUS ZenBook S Ultra Slim Laptop, 13.9" 3300x2200 3:2 500nits Touch, Intel Evo Core i7-1165G7, 16GB RAM, 1TB SSD, Thunderbolt 4, TPM, Windows 10 Pro, AI Noise-Cancellation, Jade Black, UX393EA-XB77T
ASUS ZenBook S Ultra Slim Laptop, 13.9" 3300x2200 3:2 500nits Touch, Intel Evo Core i7-1165G7, 16GB RAM, 1TB SSD, Thunderbolt 4, TPM, Windows 10 Pro, AI Noise-Cancellation, Jade Black, UX393EA-XB77T
By ASUS
$1,099.00
$1,699.99 35% OFF
ASUS Zenbook S 13 OLED Ultra Laptop, 13.3†OLED 2.8K Display, Intel Evo Certified, i7-1355U CPU, Intel® Iris Xe Graphics, 32GB RAM, 1TB SSD, Windows 11 Pro, Basalt Grey, UX5304VA-XS76T
ASUS Zenbook S 13 OLED Ultra Laptop, 13.3†OLED 2.8K Display, Intel Evo Certified, i7-1355U CPU, Intel® Iris Xe Graphics, 32GB RAM, 1TB SSD, Windows 11 Pro, Basalt Grey, UX5304VA-XS76T
By ASUS
$1,415.87
Synvy Tempered Glass Screen Protector Film, compatible with ASUS ZenBook S UX391UA UX391UA-825R 2018 13.3" Active Area Cover Only, 9H Protective Film Protectors
Synvy Tempered Glass Screen Protector Film, compatible with ASUS ZenBook S UX391UA UX391UA-825R 2018 13.3" Active Area Cover Only, 9H Protective Film Protectors
By Film for ASUS ZenBook S UX391UA UX391UA-825R 2018
$34.96

Exterior

ASUS ZenBook S UX391UA
Dimensions12.24” x 8.39” x 0.51” (311 x 213 x 12.9 mm)
Weight
  • 2.20 lbs (1.0 kg)
    With anti-glare display.
  • 2.31 lbs (1.05 kg)
    WIth glossy display.
Colors
Deep Dive Blue Burgundy Red
Keyboard and Trackpad
  • Keyboard
    • Full-size backlit with 1.2mm key travel
  • Touchpad with fingerprint reader
    • Glass-covered with integrated fingerprint sensor supporting Windows Hello; intelligent palm-rejection
    • Precision Touchpad (PTP) technology supports up to four-finger smart gestures

Display

ASUS ZenBook S UX391UA
Size13.3 Inches
Info
  • 13.3” LED-backlit 4K UHD (3840 x 2160) 16:9 glossy touchscreen
  • 13.3” LED-backlit Full HD (1920 x 1080) 16:9 glossy screen
  • 13.3” LED-backlit Full HD (1920 x 1080) 16:9 anti-glare screen
  • 5.9mm-thin bezel with 85% screen-to-body ratio
  • Wide 100% sRGB color gamut
  • IPS-level wide-view technology
  • ASUS Eye Care technology for up to 30% blue-light reduction

Ports

ASUS ZenBook S UX391UA
Ports
  • 2 x Type-C™ USB 3.1 Gen 2 (Thunderbolt™ 3)
  • 1 x Type-C™ USB 3.1 Gen 2
Note All three ports support fast charging, data transfers, and display connectivity.

Internal Specs

ASUS ZenBook S UX391UA
Processor
  1. 8th Gen Intel® Core™ i5-8250U
    4 cores, 8 threads, 1.60 → 3.40 GHz, 6MB SmartCache, 15W
  2. 8th Gen Intel® Core™ i7-8550U
    4 cores, 8 threads, 1.80 → 4.00 GHz, 8MB SmartCache, 15W

Geekbench 5 Single Core

ASUS ZenBook S UX391UA1
8th Gen Intel® Core™ i5-8250U77189.65%
2
8th Gen Intel® Core™ i7-8550U860100.00%
0860

Geekbench 5 Multi-Core

ASUS ZenBook S UX391UA1
8th Gen Intel® Core™ i5-8250U1,97177.08%
2
8th Gen Intel® Core™ i7-8550U2,557100.00%
02,557
Integrated Graphics
  1. 8th Gen Intel® Core™ i5-8250U
    Intel® UHD Graphics 620
    24 Execution Units, 300 → 1100 MHz
  2. 8th Gen Intel® Core™ i7-8550U
    Intel® UHD Graphics 620
    24 Execution Units, 300 → 1150 MHz
Memory
8GB 16GB
2133MHz LPDDR3 SDRAM Onboard Memory
Storage
  • 256GB
    SATA3 SSD
  • 512GB 1TB
    PCIe® Gen3 SSD M.2

Connectivity

ASUS ZenBook S UX391UA
Wi-FiDual-band 802.11ac Wi-Fi
BluetoothBluetooth 4.2

Battery

ASUS ZenBook S UX391UA
Size50Wh (4-cell lithium-polymer battery)
Battery LifeUp to 13.5 hours of battery life
Power Supply65W USB Type-C power adapter

Software

ASUS ZenBook S UX391UA
OS
  • Windows 10 Home
  • Windows 10 Pro
Built-in Apps
ASUS Battery Health Charging ASUS Splendid Quiet Fan

Camera & Audio

ASUS ZenBook S UX391UA
CameraFront-facing camera
720p (1280 x 720 HD) camera.
Audio
  • ASUS SonicMaster stereo audio system with surround-sound; smart amplifier for maximum audio performance
  • Array microphone with Cortana and Alexa1 voice-recognition support
  • 3.5mm headphone jack
  • Long-travel voice coils for improved low-frequency response
  • Certified by Harman Kardon

Misc

ASUS ZenBook S UX391UA
InkingSupports ASUS Pen
Sensors
  • Fingerprint sensor
Security
  • One-touch access with Windows Hello
In the box
  • ZenBook S (UX391)
  • Protective sleeve
  • USB-C™ power adaptor (65W)
  • ASUS Mini Dock (or USB-C™ to USB-A dongle and USB-C™ to HDMI dongle)
  • ASUS Pen (optional)

Key Features

ASUS ZenBook S UX391UA
At Glance
Released in
2018
16:9 4K
13.3”
2160p 60Hz
Weight
2.20 lb
1.00 kg
Up to
Intel Core i7-8550U
4C/8T, 1.80 → 4.00 GHz
Geekbench 5
860
Single Core
Geekbench 5
2,557
Multi-Core
With integrated
Intel® UHD Graphics 620
24 Execution Units, 300 → 1150 MHz
Configurable up to
16GB
2133 MHz LPDDR3

Photos

Our analysis and reviews

ASUS ZenBook S UX391UA image

What we like

Reasons to like about ASUS ZenBook S UX391UA.

Supports Windows 11

ASUS ZenBook S UX391UA exceed all minimum system requirements for Windows 11.

RequirementsASUS ZenBook S UX391UA
Secure BootYes
TPM 2.0 TPM 2.0
ProcessorIntel Core i5-8250U → Intel Core i7-8550U
4GB RAM8GB → 16GB
64GB Drive256GB → 2TB
2 Cores CPU4 cores
Great battery life of up to 13.5-hours

According to ASUS, the ASUS ZenBook S UX391UA lasts up to 13.5 hours of battery life.

Up to 13.5 hours of battery life
Upgradable storage

ASUS ZenBook S UX391UA comes with a single removable M.2 SSD slot that you can replace and upgrade in the future. Learn more

Storage SlotsASUS ZenBook S UX391UA
M.2x1

What we don't like

Reasons not to like about ASUS ZenBook S UX391UA.

Non-upgradable memory

The memory on ASUS ZenBook S UX391UA is soldered to the motherboard, and there is no additional RAM slot for expansion. Since you can't change or add more RAM after you buy, you want to make sure you pick the configuration with the right amount of memory at the initial purchase. Learn more

MemoryASUS ZenBook S UX391UA
Slots0 - Onboard
TypeLPDDR3
Speed2133 MHz