ASUS Zenbook DUO

LaptopMedia.com Laptop Specs ASUS Zenbook DUO (UX8406) ASUS Zenbook DUO

Date Published: 15 Aug 2025

Intel Core Ultra 9 285H
Intel Arc 140T
14.0″, 2.8K (2880 x 1800), 120 Hz, OLED
4000GB SSD
32GB RAM
1.60 kg (3.5 lbs)

TOTAL SCORE

7.0 Portability Very Good

10.0 Display EXCEPTIONAL

7.2 For Work Very Good

5.8 For Gaming Average

Best Prices Specs Review For Work For Gaming

ASUS Zenbook DUO

$3879^.99

Buy Now Amazon.com

Specs

Display
14.0″, 2.8K (2880 x 1800), 120 Hz, OLED

HDD/SSD
4000GB SSD

M.2 Slot
1x 2280 M.2 NVMe PCIe 4.0 x4 See photo

RAM
32GB RAM

OS
Windows 11 Pro

Body Material
Aluminum, Magnesium alloy

Dimensions
313.5 x 217.9 x 14.6 - 19.9 mm (12.34" x 8.58" x 0.57")

Weight
1.60 kg (3.5 lbs)

Ports and connectivity

1x USB Type-A
3.2 Gen 1 (5 Gbps)

2x USB Type-C
Thunderbolt 4, Power Delivery (PD), DisplayPort

HDMI
2.1

Card Reader

Ethernet LAN

Wi-Fi
Wi-Fi 6E / Wi-Fi 7

Bluetooth
5.3 / 5.4

Audio jack
3.5mm Combo Jack

Features

Fingerprint reader

Web camera
FHD IR with support for Windows Hello

Backlit keyboard

Microphone
Array Microphone with Cortana Support

Speakers
Speaker, Smart Amp Technology, harman/kardon

Security Lock slot

Gifts
USB-C DV4K 100W Universal Docking Station

Portability

ASUS Zenbook DUO (UX8406)

12.34" x 8.58" x 0.57" Dimensions

1.60 kg (3.5 lbs) Weight

Average 14.0-inch laptop

1.47 kg (3.2 lbs) -8% Weight

Review

ASUS Zenbook DUO in-depth review

The UX8406C version is almost the same device as the Zenbook DUO (UX8406). The main difference between the two is the CPU platform. The UX8406C is based on the latest and greatest Intel Core Ultra Series 2 processors which are also known as Arrow Lake. At least for now, you can choose between the 45W and highly clocked Core Ultra 9 285H and the 28W Core Ultra 7 255H. The latter has the same core count and cache size as the 285H chip which makes it a perfect choice for people who don't require top-end performance for everyday tasks and want to save some money.Both CPUs have the same iGPU under the bonnet and that's the Intel Arc 140T. This one is based on the Xe+ architecture. Just for comparison, the Intel Arc Graphics 140V inside the Core Ultra 7 258V is based on the Xe2 architecture [...]

Read the full review

Pros

The new Intel Arc 140T is good for entry-level gaming
Exceptional build quality
Infinite contrast ratio (SDC419D)
3K resolution and a 120Hz refresh rate (SDC419D)
Full DCI-P3 coverage + great color accuracy (SDC419D)
Dual-screen design
180-degree hinge
Nice external keyboard with a smooth and precise touchpad
Modern I/O with two Thunderbolt 4 ports
Long battery life given the Core Ultra 9 285H under the hood
Quiet fans in "Whisper mode"
The fans aren't too noisy in "Full-Speed mode"
1080p IR Web camera
Arrow Lake CPU options
High P and E-core clock in short and medium loads
Impressive overall performance despite the two displays
Low NVMe temperatures
Up to 32GB LPDDR5x-7467 RAM which also boosts the iGPU performance
Wi-Fi 7

Cons

PWM usage when the “OLED Flicker-Free Dimming” function is turned off (Samsung ATNA40CU06-0)
The processor frequencies in long loads are a bit below the official values
Soldered RAM and just one M.2 slot
Hard to open
Inverted motherboard which complicates the potential SSD upgrade

Disassembly, maintenance and upgrade options

Step 1: Opening the ASUS Zenbook DUO (UX8406)Power off the ASUS Zenbook DUO (UX8406) and place it on a soft, clean surface to prevent scratches. Remove the 12 Torx-head screws from the laptop's bottom, including the one hidden beneath the kickstand. The kickstand is secured with two pairs of screws. Unscrew the two Torx-head screws to open the small service door. Detach the battery and the second display ribbon connector by flipping up its plastic cap before gently pulling it out. Use a thin plastic tool to pry open the zone around the second panel, starting from the ba[...]