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What was missing from the Asus Zenbook Duo range, which has been on the market for almost 2 years now? The answer was always the same: more power. A dual-screen OLED laptop concept inevitably suggests the idea of producing under perfect conditions on the go. For this, a simple mobile chip can be limiting.
Enter the Intel Core Ultra X9 388H, particularly its Intel Arc B390 graphics part with 12 compute units that promises a lot. Will it finally unlock the potential of this innovative format? That’s what we’ll explore in this review.
Technical Specifications
| Model | ASUS Zenbook DUO (UX8407) |
|---|---|
| Dimensions | 310.1 mm x 23.4 mm |
| Resolution | 2880 x 1800 pixels |
| Display Technology | OLED |
| Touch Screen | Yes |
| Processor (CPU) | Core Ultra X9 388H |
| Graphics Chip (GPU) | Intel ARC Graphics |
| RAM | 32 GB |
| Internal Memory | 2048 GB |
| Appearance | Ceramic |
| Operating System (OS) | Microsoft Windows 11 |
| Weight | 1650 grams |
| Depth | 208.6 mm |
| Product Sheet |
Design
The Asus Zenbook Duo 2026 is more or less a familiar format for us. If the presentation of the first model had left an impression, it was also part of an initial wave trying to test a new format. It’s hard to say if this has truly captivated consumers, but one thing is certain: it’s not due to its construction.
In this 2026 model, we find everything that we already liked about the previous versions. Of course, there’s first the perfect hinge, neither too stiff nor too loose, allowing the computer to be comfortably positioned. This stand on the back, too, has the same qualities and allows the computer to be placed both horizontally and vertically with ease.
But the star of the show remains this detachable keyboard, which works just as well placed on the lower screen to maintain a traditional laptop appearance as it does disconnected and in Bluetooth, paired automatically. The pogo connectors allow it to constantly keep battery power, making it almost impossible to run out of battery. And if you choose to be more stationary than planned, a shutdown button is located on the left side of it.
This transformability and adaptability to multiple scenarios are the great strengths and the signature of the Asus Zenbook Duo, and the 2026 formula is simply the absolute refinement of this initial vision discovered two years ago. But the compromises remain the same. Although it is possible to close the computer in a traditional manner, keyboard sandwiched between the screens, the formula is heavier (1.65 kg) and thicker (1.96 cm) than the standards of modern ultraportables. For what it offers, one can easily forgive, but it’s essential to be aware of this to avoid disappointment.
Note that the main components of this machine are, as is traditional, integrated into the base which remains thicker than the upper screen.
Keyboard and Touchpad
Almost ironically, the keyboard remains the greatest success of this Zenbook Duo format. Because innovative formats like this often make small ergonomic sacrifices that it does not allow. Perfectly rigid, and therefore usable both on a table and on your knees, it offers switches of a quality similar to other products from the brand. Understand that they can be a bit soft, very slightly, but their activation distance is very satisfying.
The same goes for the touchpad, which is of a satisfying size and very modern with perfect glide. We’re not dealing with a haptic feedback pad, but it’s at the top of the classic category.
Connectivity
On the left, we can enjoy an HDMI 2.1 port, a Thunderbolt 4 port, and a combo jack socket. On the right, we have a USB A 3.2 Gen 2 port, a second Thunderbolt 4 port, and the power button.
For this format, we have here a connectivity as diverse as possible and which will not hinder any type of use. Certainly, for creatives, an SD card reader would have been appreciated, but the physical constraints are obvious here with the two vents encircling the body.
The only real flaw: this power button, very soft and lacking feedback to reassure on its press. We would have liked a more elegant and easy-to-find solution at the fingertips.
Webcam and Audio
The Asus Zenbook Duo 2026 integrates a basic 1080p webcam, compatible with Windows Hello facial recognition. Its rendering is not particularly satisfying or modern, with a cottony and very noisy and retouched image that is not up to the competition.
The same goes for the sound, coming from speakers placed in the groove between the two screens. Clever placement, and well-optimized, for a sound that knows where it stands. Understand that it chooses clarity at the expense of everything else. The experience remains gentle on the ears, although the overall volume is quite low and no signal really stands out. We do what we can with such a format, and the compromise makes sense.
Screen
The star of the show, or rather the stars of the show on this Asus Zenbook Duo 2026. Let’s face it: the two parts are virtually perfectly equivalent, to the point that after measurement, we’ll talk about them as a whole. So, we are in front of two 14-inch OLED panels supporting a resolution of 2880 x 1800 pixels, which is a 16:10 ratio. These are touchscreens and support a maximum refresh rate of 144 Hz.
Under our probe and with the CalMAN software from Portrait Displays, we find coverage of 112% of the DCI-P3 space for 167% of the sRGB space. The maximum brightness is measured in SDR mode at 472 cd/m², quite correct, for an average color temperature of 6379K close to perfection. The average delta E00 is 1.61, with a maximum shift of 3.87 on royal blue tones. Suffice it to say: it’s simply perfect, especially for creatives.
In HDR mode, we find an impressive peak brightness of 1,071 cd/m² which is drool-worthy for cinema. But alas, as always on laptops, HDR is not well calibrated and brightness tends to harm the precision of the displayed images. However, for the grand spectacle, one might be tempted to activate it from time to time, even if we advise staying in SDR by default as Asus does.
Software
The software experience offered by Asus does not change one iota here, which is rather positive. We find MyAsus, at the center of all settings, always very easy to read and filled with useful explanations. There is also StoryCube, the AI media sorting tool for creatives, dispensable but nice.
Although you will certainly need to do a little cleaning of the adware on the configurations sold on the market, it’s not so dramatic.
Performance
Here we are, at the heart of the matter. We are finally in front of the Intel Core Ultra X9 388H, or the star of the new Panther Lake generation. We therefore have 16 cores — 4 performance, 8 efficient, 4 low energy — for 16 threads that can turbo up to 5.1 GHz. It is coupled with 32 GB of LPDDR5X RAM at 9,600 MT/s, and benefits from this famous Intel Arc B390 graphics part with 12 compute units. 1 TB of PCIe 4.0 storage rounds out the package.
Benchmarks
Starting with the traditional Cinebench 2024, where we find scores of 1,149 points in multi-core and 130 points in single-core. These translate under Cinebench 2026 into 4,488 points multi-threaded and 536 single-threaded. A modest progression over the Core Ultra of the previous generation for sure, both in single-core and multi-core, which is not necessarily the most enticing.
It’s when unplugging the machine and switching to balanced and power-saving modes that we better see the real novelty of the Core Ultra 300. It’s simple: in balanced mode, with reduced consumption, we have… essentially the same scores, 4,007 points in multi and 525 in single. And in power-saving mode, we record a steeper drop to 3,186 points in multi and 507 points in single-core.
The most interesting? In its power-saving mode, the Core Ultra X9 388H remains more powerful than the Core Ultra 7 255H, which scores at 495 points in its maximum mode, and is much more powerful than the 2025 model, which recorded 735 points in multi and 76 points in single under Cinebench 2024.
We find essentially the same thing under 3DMark Steel Nomad Light, with a score of 6,352 points far ahead of any integrated part except the Ryzen AI Max, which drops to 4,971 points only in power-saving mode… but remains nonetheless ahead of everyone else.
However… the storage memory is disappointing. While the read rate is common for PCIe 4.0, the write rate at 1452 MB/s is disappointing. Asus clearly had to make a financial concession here, potentially due to a lack of available flash memories.
In Game
First of all, this generation allows us to enjoy XeSS 3 and particularly its x4 frame generation. Let’s face it: everything is more or less comparable to NVIDIA’s DLSS, and works on the same principle. And if the Transformer 2.0 model works wonders on the RTX 50, the lighter CNN model still used here allows Intel to essentially stay in the same quality frame as DLSS 3 at the time. Fun fact: these figures in High are essentially comparable to what can be found on an RTX 5050 pushed to Ultra on the desktop part. For an integrated graphics part, it’s very enticing.
Compared to the ROG Ally X, the flagship of portable console PCs powered by the Z2 Extreme and its unbeaten Radeon 890M graphics part in Turbo mode at maximum performance… It’s a slaughter, simply. +62% on Cyberpunk 2077, +60% on Miles Morales, +36% on Monster Hunter Wilds, +71% on Ratchet and Clank: Rift Apart and +54% on The Witcher 3.
The XeSS rendering being far superior to the FSR 3 available on current portable AMD SoCs, everything is just better. And to drive the point home, this Intel Arc B390 has quite good ray-tracing capabilities to properly support Cyberpunk 2077 in RT Low, or even RT Medium, without major visual sacrifices… We promised you a slaughter, and you have it.
For Creatives
For photo processing, the integrated chip matches the performance offered by a mobile RTX 5060, which is quite engaging. It’s on video that alas, we still lag behind more powerful solutions, an RTX 5050 offering double the performance. Nevertheless, compared to the previous generation, we reach heights that we could not have imagined reaching so soon.
Cooling and Noise
The Asus Zenbook Duo of 2026 is not a particularly noisy device, even if it will make itself heard when pushed to its power limits. Let’s say that without reaching the level of a gaming PC, it remains in the high range of ultraportable PCs.
The heat management, however, is relatively well controlled considering its performance. The vents placed on both sides of the lower chassis do a lot to properly redistribute this central heat without inconvenience for the user, with degrees not exceeding the usual 50 °C on these formats.
Battery Life
The Asus Zenbook Duo of 2026 requires a 100W USB-C power adapter following the Power Delivery standard, which can therefore be replaced by any following this standard. Naturally, you will need these 100W to take advantage of the device’s maximum performance. The built-in battery is 99 Wh, the maximum allowed on a portable device on a plane.
For light office use, we find a battery life between 14 and 15 hours… using both screens simultaneously. Yes, this is essentially the average battery life observed on the previous generation… on a product with two constantly lit screens. And not those that consume the least, moreover.
When used in simple laptop mode, second screen replaced by the magnetically attached keyboard, we find rather between 23 and 24 hours. A record for the market, simply.
Price and Availability
The Asus Zenbook Duo of 2026 will be available in the first quarter of 2026 in France, priced at 2,799 euros for this Intel Core Ultra X9 version with 1 TB of storage. A 2 TB version will be sold for 2,999 euros.
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Maya Singh is a senior editor covering tablets and hybrid devices. Her work explores how these tools reshape digital productivity and learning. She also contributes to feature editorials on emerging tech.
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