We first saw the new Intel Panther Lake laptop chip in action at their event in Arizona last October, and today we can review the finished result. This 2026 Asus Zenbook Duo packs the most grunty Panther Lake of them all, the Core Ultra X9 388H. The hardware includes 16 CPU cores and 12 Xe3 graphics cores but the headline feature is the Duo part of the name which refers to the dual 14-inch OLED screens. As you will see, it is pretty nifty.
Timestamps:
00:00 Intro
01:11 Meet the Duo!
02:02 Duo-screen basics and functionality
05:16 The quirks of the design
06:16 Core spec
07:25 CPU benchmark results
10:40 System test results
10:10 Game benchmarks
15:07 We’ve not taken it apart…
15:44 Dual batteries – does that explain benchmark curiosities?
17:04 Leo’s pros and cons
Features
- The most compact Zenbook Duo ever with new hideaway hinge design and nearly 20-inches expansive view.
- Perfect for mobile multitasker to enjoy professional-grade viewing: Dual 14-inch 3K 144Hz Asus Lumina Pro OLEDs, 1000 nits touchscreen display. Anti-reflection clarity outdoors.
- Lightweight mobile studio provides peak performance of up to Intel Core
Ultra X9 Series 3 with discrete-level GPU acceleration, unlocking exceptional power for AI, rendering, and gaming on the go.
- Dual-screen laptop with 18+ hour battery life.
- From Ceraluminum chassis, hinge, kickstand to the screens, setting the gold standard for durability in portable computing.
- Versatile modes with intuitive smart gesture control. Asus Pen 3.0 support.
Specification
- Processor: Intel Core Ultra X9 Processor 388H (4x P-cores, 8x E-cores, 4x LP-cores)
- Graphics: Intel Arc B390
- Neural processor: Intel NPU (up to 50 TOPS)
- Display: 14.0-inch, 3K (2880 x 1800) OLED, 16:10, 0.2ms response time, 144Hz refresh rate, 500 nits typical, 1000 nits HDR peak
- Memory: 32GB LPDDR5X 9600MT/s (onboard)
- Storage: 1TB Samsung PM9C1b M.2 NVMe PCIe 4.0 SSD
- Ports (left side):
- 1x HDMI 2.1
- 1x Thunderbolt 4 (40Gbps, display and power delivery)
- 1x Headset jack
- Ports (right side):
- 1x USB 3.2 Gen 2 Type-A (10Gbps)
- 1x Thunderbolt 4 (40Gbps, display and power delivery)
- Keyboard & touchpad: Soft keyboard, 1.7mm key travel, Precision touchpad
- Camera: FHD camera with IR (Windows Hello support)
- Audio: Built-in array microphone with Cortana support
- Network: Wi-Fi 7 and Bluetooth 5.4
- Battery: 99Wh, 4S1P, 4-cell Li-ion
- Power supply: 100W USB Type-C
- Dimensions: 31 cm (W) x 21 cm (D) x 2.3 cm (H)
- Weight: 1.68 kg (plus 0.48 kg charger and mains cable)
- Operating system: Windows 11 Home
Testing and Performance
Geekbench 6 Multi Core

in Geekbench 6 Multi Core we see the Asus Zenbook Duo performing well, with the Intel Core Ultra X9 388H some 30% ahead of the previous Core Ultra 9 285H.
Cinebennch 2026 Multi Core

It is a slightly different story in Cinebench 2026 Multi Core where we again see the new Intel Panther Lake wreck the previous Lunar Lake, however the top honours go to AMD with the mighty Strix Halo in the HP Zbook Ultra G1a.
Cinebench 2026 Multi Core points per Watt

Our Cinebench 2026 power efficiency calculation shows the amazing efficiency of Intel's new Core Ultra X9 388H which has good performance and very low power draw.
Far Cry 6 at 2,880×1,800 with FSR Performance Mode

In Far Cry 6 at the massive resolution of 2,880×1,800 running on the Ultra preset we used the FSR Performance Mode and saw average frame rates north of 70fps. This is remarkable performance from Intel's latest iGPU and it looks great on the Asus OLED screen.
Cyberpunk 2077 at 1,920×1,200 with Frame Gen Enabled

Cyberpunk 2077 is a stiff test with the Ultra preset, but running at 1,920×1,200 with Frame Gen Enabled we saw excellent frame rates from the Asus Zenbook Duo. Having said that, the HP Zbook Ultra G1a smashed it out of the park.
Battery Life

Battery life is a critical aspect of a laptop and the new Zenbook Duo does monumentally well, running for just under 24 hours. This is a superb testament to both Asus and Intel.
Closing Thoughts
The changes made by Asus to the 2026 version of Zenbook Duo are very good and we love the way the dual OLED screens almost merge into one display. As an added bonus the 2026 laptop is notably more compact than previous versions, and this approach to packing two full sized 14-inch displays into a fairly regular laptop demonstrates some impressive engineering by Asus.

The new Intel Core Ultra X9 388H is an impressive piece of silicon and our first impressions mark the Intel 18A process as a success. The CPU part of the chip has decent performance and requires very little power. In addition the 12x Xe3 graphics core delivers sufficient performance for daily use as well as serious gaming sessions.
You can buy the Asus Zenbook Duo UX8407A for £2,499.99 HERE
Pros:
- The dual 14-inch OLED screens are superb.
- Battery life is monumental.
- Intel 12x Xe3 graphics are impressive.
- Intel Panther Lake CPU is good.
Cons:
- Zenbook Duo is somewhat chunky and slightly heavy.
- Price is high.
- Ports and connectors are rather close together.
KitGuru says: The latest version of Asus Zenbook Duo comes with Intel Core Ultra X9 and delivers a superb experience.

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Asus Zenbook Duo UX8407 Review (Dual OLED!) first appeared on
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