Asus ZenBook S 14 UX5406 14"

Name: Asus ZenBook S 14 UX5406 14"
Brand: Asus
SKU: 56719

Manufacturer: Asus

The Asus ZenBook S 14 UX5406 is a 14″ productivity laptop built around a slim 11 mm chassis that weighs just 1,200 g, making portability a clear design priority. It runs on Intel Arc Graphics 140V integrated graphics paired with a processor built on a 3 nm semiconductor process, and ships with a backlit keyboard along with 3D facial recognition for convenient authentication.

The display is a 2880x1800 OLED panel with a 120 Hz refresh rate, 242 ppi pixel density, and a 1,000,000:1 contrast ratio, backed by 400 nits of typical brightness. On the performance side, the system carries 32 GB of DDR5 memory running up to 8,533 MHz across two channels, a 1 TB NVMe SSD, and a turbo clock speed reaching 5.1 GHz. Connectivity includes two Thunderbolt 4 ports, one USB 3.2 Gen 2 Type-A port, HDMI 2.1 output, Wi-Fi 7, and Bluetooth 5.4, while the 72 Wh battery supports sleep-and-charge functionality.

Pros

The OLED display delivers a 1,000,000:1 contrast ratio at 2880x1800 resolution with a 120Hz refresh rate, making it well-suited for detailed visual work
At 1,200 g and just 11 mm thick, the chassis is genuinely portable for daily carry without sacrificing a full 14-inch screen
Two Thunderbolt 4 ports support up to three simultaneous displays and high-speed peripherals, offering solid expandability for a slim machine
32 GB of DDR5 memory running at up to 8,533 MHz provides substantial headroom for multitasking and memory-intensive workloads
Wi-Fi 7 support ensures compatibility with the latest wireless networking standards alongside backward compatibility with older Wi-Fi generations
3D facial recognition enables hands-free login without relying on a fingerprint scanner

Cons

Memory is soldered with no available slots, so the 32 GB configuration cannot be upgraded after purchase
No RJ45 port means wired ethernet requires an adapter, which may be inconvenient in office or travel environments
The display lacks an anti-reflection coating, which can affect usability in brightly lit settings
With only one USB Type-A port, users with multiple standard peripherals will need a hub or dock
There is no fingerprint scanner as an alternative authentication method if facial recognition is unavailable
The integrated Arc Graphics 140V does not support ray tracing or DLSS, limiting graphics-intensive use cases

Who is this for?

This laptop is well-suited to professionals and students who need a capable machine for everyday productivity and content work on the move, given its 1,200 g weight and 11 mm slim profile. The 2880x1800 OLED touchscreen with a 120Hz refresh rate and 1,000,000:1 contrast ratio makes it a practical choice for those who work extensively with visuals, documents, or media. The combination of 32 GB DDR5 memory, a fast NVMe SSD, and two Thunderbolt 4 ports also caters well to users who regularly connect external displays or high-bandwidth peripherals in a desk setup.

Who is this NOT for?

Users who require dedicated graphics performance will find this machine inadequate, as the integrated Arc Graphics 140V lacks support for ray tracing and DLSS, making it unsuitable for gaming or GPU-intensive rendering workloads. Those who need to expand system memory over time will also be poorly served, since the RAM is soldered with no available slots and is capped at 32 GB. Additionally, professionals who depend on a wired network connection or regularly use multiple USB-A devices will face practical limitations, as the device offers no RJ45 port and only a single USB Type-A port.

Design:

Type	Productivity
weight	1200 g
Uses a fanless design	✕
Has a backlit keyboard	✓
volume	729.74 cm³
width	310 mm
height	214 mm
thickness	11 mm
is weather-sealed (splashproof)	✕
has a rugged build	✕

The Asus ZenBook S 14 UX5406 is classified as a productivity laptop and is built with a notably slim profile, measuring 11 mm thick with a footprint of 310 x 214 mm and a total volume of 729.74 cm³. At 1,200 g, it is designed to be carried without much effort throughout the day. The machine includes a backlit keyboard for low-light usability, but does not use a fanless design, meaning active cooling is present. It carries no weather-sealing or rugged construction, so it is intended for everyday indoor and professional environments rather than harsh conditions.

Display:

screen size	14"
resolution	2880 x 1800 px
pixel density	242 ppi
Display type	OLED/AMOLED
has a touch screen	✓
brightness (typical)	400 nits
refresh rate	120Hz
contrast ratio	1000000:1
has anti-reflection coating	✕
supported displays	3

The ZenBook S 14 UX5406 features a 14″ OLED/AMOLED touchscreen with a resolution of 2880 x 1800 px and a pixel density of 242 ppi, delivering a sharp and detailed image across the panel. The display runs at a 120 Hz refresh rate and offers a typical brightness of 400 nits, while its 1,000,000:1 contrast ratio is characteristic of OLED technology. There is no anti-reflection coating on the panel, and the system supports up to three simultaneous displays in total.

Performance:

RAM	32GB
Uses flash storage	✓
internal storage	1024GB
CPU speed	4 x 3.3 & 4 x 3.3 GHz
CPU threads	8 threads
Is an NVMe SSD	✓
DirectX version	DirectX 12 Ultimate
uses multithreading	✓
maximum memory amount	32GB
DDR memory version	5
turbo clock speed	5.1GHz
GPU turbo	2050 MHz
memory slots	0
PCI Express (PCIe) version	4
semiconductor size	3 nm
has XeSS (XMX)	✕
Supports 64-bit	✓

The ZenBook S 14 UX5406 is equipped with 32 GB of DDR5 memory, which is also the maximum supported amount, with no user-accessible memory slots for expansion. Storage is handled by a 1024 GB NVMe SSD connected over PCIe 4.0, using flash storage technology for fast read and write operations. The processor runs eight threads with a base clock of 4 x 3.3 GHz across all cores and a turbo speed reaching 5.1 GHz, built on a 3 nm semiconductor process with multithreading support and 64-bit compatibility. The GPU reaches a turbo frequency of 2050 MHz and supports DirectX 12 Ultimate, though XeSS (XMX) acceleration is not available.

Benchmarks:

PassMark result	20093
PassMark result (single)	4333

In CPU benchmark testing, the ZenBook S 14 UX5406 achieves a PassMark multi-core score of 20,093, reflecting its overall multi-threaded processing capability, while the single-core PassMark result stands at 4,333, indicating the per-core performance available for tasks that rely on single-threaded execution.

Connectivity:

USB 3.2 Gen 2 ports (USB-C)	0
USB 3.2 Gen 2 ports (USB-A)	1
USB 4 20Gbps ports	0
USB 4 40Gbps ports	2
Thunderbolt 4 ports	2
USB 3.2 Gen 1 ports (USB-C)	0
USB 3.2 Gen 1 ports (USB-A)	0
Thunderbolt 3 ports	0
has an HDMI output	✓
Has USB Type-C	✓
supports Wi-Fi	✓
Wi-Fi version	Wi-Fi 7 (802.11be), Wi-Fi 6E (802.11ax), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
has an external memory slot	✕
Bluetooth version	5.4
RJ45 ports	0
HDMI ports	1
HDMI version	HDMI 2.1
DisplayPort outputs	0
USB 2.0 ports	0
has AirPlay	✓
mini DisplayPort outputs	0
has a VGA connector	✕

The ZenBook S 14 UX5406 offers a focused but capable port selection, headlined by two Thunderbolt 4 ports that also function as USB 4 40Gbps connections, alongside one USB 3.2 Gen 2 Type-A port for standard peripherals. Video output is handled by a single HDMI 2.1 port, while DisplayPort, mini DisplayPort, VGA, and RJ45 are all absent. There is no external memory card slot, and no USB 2.0, USB 3.2 Gen 1, or USB 3.2 Gen 2 Type-C ports are included. Wireless connectivity covers Wi-Fi 7 (802.11be) along with Wi-Fi 6E, 6, 5, and 4, paired with Bluetooth 5.4, and AirPlay is also supported.

Battery:

battery size	72 Wh
Has sleep-and-charge USB ports	✓
Has a MagSafe power adapter	✕

The ZenBook S 14 UX5406 houses a 72 Wh battery and supports sleep-and-charge through its USB ports, allowing connected devices to be charged even when the laptop is not in active use. It does not include a MagSafe power adapter.

Features:

has stereo speakers	✓
has a socket for a 3.5 mm audio jack	✓
supports ray tracing	✕
supports DLSS	✕
has Dolby Atmos	✕
Stylus included	✕
Has a fingerprint scanner	✕
number of microphones	1
Uses 3D facial recognition	✓
has voice commands	✕
has a front camera	✓
Has S/PDIF Out port	✕
has a gyroscope	✕
has GPS	✕
has an accelerometer	✕
has a compass	✕
Has an optical disc drive	✕

The ZenBook S 14 UX5406 includes stereo speakers, a 3.5 mm headset jack, and a single built-in microphone for audio input, though it lacks Dolby Atmos, S/PDIF output, and voice command support. Security and login are handled via 3D facial recognition, while a fingerprint scanner is not present. The laptop has a front-facing camera but does not come with a stylus. On the graphics side, neither ray tracing nor DLSS is supported. Sensor-wise, the device has no gyroscope, accelerometer, compass, or GPS, and there is no optical disc drive included.

Miscellaneous:

clock multiplier	33
PassMark result (overclocked)	21054
Type	Laptop
instruction sets	MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has an unlocked multiplier	✕
L3 cache	12 MB
Has NX bit	✓
CPU temperature	100 °C
OpenCL version	3
OpenGL version	4.6
GPU execution units	8
GPU name	Arc Graphics 140V
Has integrated graphics	✓
Supports ECC memory	✕
memory channels	2
RAM speed (max)	8533 MHz
Thermal Design Power (TDP)	30W
Uses big.LITTLE technology	✓

The laptop CPU carries a clock multiplier of 33 and a TDP of 30W, with a maximum operating temperature of 100 °C, and uses big.LITTLE technology for workload distribution across cores. The multiplier is locked, meaning no manual overclocking is available, though the system achieves a PassMark overclocked score of 21,054. Graphics are handled by the integrated Intel Arc Graphics 140V, which features 8 execution units and supports OpenCL 3 and OpenGL 4.6, with ECC memory not supported. The processor includes a 12 MB L3 cache, supports the NX bit for hardware-level security, and is compatible with instruction sets including MMX, AES, AVX, AVX2, FMA3, F16C, SSE 4.1, and SSE 4.2. Memory runs across two channels at up to 8,533 MHz, and the CPU is classified as a laptop-type processor.

Final Verdict

The Asus ZenBook S 14 UX5406 is a well-defined productivity laptop that prioritizes portability and display quality above all else, packaging a sharp 2880x1800 OLED touchscreen with a 120Hz refresh rate into a chassis that weighs just 1,200 g at 11 mm thin. The 32 GB of DDR5 memory paired with two Thunderbolt 4 ports gives it genuine utility for professionals who multitask across applications and connect external displays or high-speed peripherals. Its limitations — soldered memory, integrated-only graphics, and a minimal port selection — place clear boundaries on who will get the most from it, but within its intended scope as a slim, portable workstation for everyday professional use, it is a coherent and well-specified machine.