Asus Zenbook 14 UX3405 CU9 285H Review

The Asus Zenbook 14 UX3405 CU9 285H pairs a 16-core Intel Core Ultra 9 285H processor with a 14 inch 2.8K OLED display at 120Hz, all in a 1.28kg chassis. It stands out from typical ultrabooks by supporting XG Mobile external graphics, giving buyers a path to more GPU power at a desk.

Display

The 14 inch 2.8K (2880 x 1800) OLED panel runs at 120Hz with a 16:10 aspect ratio and a 0.2ms response time. It offers 500 nits typical brightness with a 1100 nits HDR peak and 100 percent DCI-P3 color coverage, making it a strong choice for both everyday work and color sensitive tasks. The display is non-touch.

Performance

The Intel Core Ultra 9 285H runs at 2.9GHz base and boosts up to 5.4GHz across 16 cores and 16 threads, with 24MB of cache and an AI Boost NPU rated up to 13 TOPS. Paired with integrated Intel Arc Graphics, it comfortably handles everyday productivity and multitasking. 32GB of LPDDR5X RAM keeps heavy workloads responsive, and the 1TB PCIe Gen4 NVMe SSD offers fast storage.

Battery and Portability

A 75Whr battery supports a full day of typical use. At 1.28kg and about 31 x 22 x 1.5cm, it remains easy to carry, though slightly heavier than the lightest Zenbook Air models.

Design, Audio and Ports

A notable detail here is the keyboard: the precision touchpad includes NumberPad support, giving this compact ultrabook a usable numeric keypad without adding a wider chassis. Audio comes from a built-in speaker system with Smart Amp Technology and harman/kardon Premium tuning, and the FHD camera includes infrared Windows Hello support. Connectivity includes two Thunderbolt 4 ports, one USB 3.2 Gen 1 Type-A port, HDMI 2.1 with XG Mobile external graphics support, and a 3.5mm combo jack, backed by Wi-Fi 7 and Bluetooth 5.4.

Pros and Cons

Pros

• Sharp 2.8K OLED display with 120Hz refresh and 1100 nits HDR peak
• 16-core Core Ultra 9 285H processor with 32GB RAM
• XG Mobile support for external GPU expansion at a desk
• NumberPad-enabled touchpad on a compact 14 inch chassis
• harman/kardon-tuned audio

Cons

• Integrated graphics only unless paired with an external XG Mobile GPU
• Slightly heavier than Asus’s lightest Zenbook Air models

Frequently Asked Questions

Is the Asus Zenbook 14 UX3405 CU9 285H good for creative or GPU-heavy work?
On its own, it relies on integrated Intel Arc Graphics for everyday tasks. For heavier GPU work, it supports XG Mobile external graphics for extra power at a desk.

What does NumberPad support mean on this laptop?
The touchpad can display a virtual numeric keypad, giving users number entry without needing a wider chassis with a dedicated keypad.

How portable is this laptop?
It weighs 1.28kg, which is easy to carry daily, though slightly heavier than Asus’s lightest Zenbook Air configurations.

What warranty does it come with?
It includes a 2-year manufacturer’s limited warranty from Asus.

Final Verdict

The Asus Zenbook 14 UX3405 CU9 285H combines strong everyday performance with a genuinely useful NumberPad touchpad and XG Mobile external graphics support. For professionals who want flexibility to expand their setup later, it’s a distinctive choice among 14 inch ultrabooks.

Explore full specifications and availability here: Asus Zenbook 14 UX3405 CU9 285H