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ASUS Zenbook DUO (2026) UX8407AA-DS99T vs ASUS Zenbook S 14 (2026) UX5406AA

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Product A: ASUS

Zenbook DUO (2026) UX8407AA-DS99T

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B

Product B: ASUS

Zenbook S 14 (2026) UX5406AA

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Only differences

AASUS Zenbook DUO (2026) UX8407AA-DS99T

BASUS Zenbook S 14 (2026) UX5406AA

General

6 of 9 differ

Series

Zenbook2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Zenbook line.

Zenbook S2Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406Read 10 October 2026Zenbook S 14 series name on the maker page.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

UX8407AA-DS99T1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026The US tech spec tab shows one UX8407AA column with several CPU and storage options. The exact DS99T row is in the US press release and the ASUS Store listing.

UX5406AA1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026ASUS Singapore tech spec tab lists the single model UX5406AA. The global and US tabs also list the Lunar Lake UX5406SA, which is a different product.

GTIN / EAN

Not available

Not available

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

7 January 20264Press releasepress.asus.com/news/press-releases/asus-zenbook-duo-2026Read 13 October 2026Announcement dated January 7, 2026 in Taipei.

Not available

Status

Available5Maker product pageeshop.asus.com/us/90nb16v1-m00j80-asus-zenbook-duo-ux8407-copilot-pc.htmlRead 13 October 2026ASUS Store listing for UX8407AA-DS99T (part 90NB16V1-M00J80) with Add to Cart and most orders shipping within 24 hours.

Available1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026UX5406AA is listed on the ASUS Singapore tech spec tab on 2026-10-10.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

ASUS Zenbook S 14 (2024) UX5406SA-BH71T-CB4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Ultrabookreview treats the 2026 Zenbook S14 UX5406AA as the update of the previous Zenbook S14 UX5406SA generation.6Reviewultrabookreview.com/69717-asus-zenbook-s14-oled-reviewRead 23 October 2026Ultrabookreview's UX5406SA review says the UX5406AA is a more recent update of the Zenbook S14.

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$2,499.993Press releaseasus.com/us/news/the-all-new-zenbook-duo-is-now-available-for-pre-order-in-the-united-statesRead 13 October 2026MSRP $2,499.99 for UX8407AA-DS99T. The X9 model UX8407AA-PSX9T is $2,699.99.

Not available

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US3Press releaseasus.com/us/news/the-all-new-zenbook-duo-is-now-available-for-pre-order-in-the-united-statesRead 13 October 2026US pre-order announcement from ASUS USA.

Not available

ColoursiThe maker's own colour names

Moher Gray1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Color Moher Gray.

Antrim Gray1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Antrim Gray.

Segment

Ultrabook2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Maker FAQ describes it as a portable, premium thin and light dual-screen device.

Ultrabook1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Thin and light Zenbook with a 1.20 kg body and an OLED touch display.

Form factor

Dual screen2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Dual-screen laptop with two 14 inch displays and a detachable Bluetooth keyboard.

Clamshell4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026The screen opens to about 145 degrees and does not lie flat, so it is a clamshell.

Chassis

5 of 6 differ

DimensionsiClosed laptop body size. Minimum and maximum thickness describe the front and rear or other points stated by the maker.

Width310.1Depth208.6Thickness (min)19.6Thickness (max)23.4mm(12.2 × 8.2 × 0.8 to 0.9 in)1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 202631.01 x 20.86 x 1.96 ~ 2.34 cm with the keyboard attached.

Width310.3Depth214.7Thickness (min)11.9Thickness (max)12.9mm(12.2 × 8.5 × 0.5 in)1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 202631.03 x 21.47 x 1.19 ~ 1.29 cm.

Weight (published)iPublished laptop weight without the charger. A starting weight is identified in the source note and may vary with configuration.

1.65kg(3.6 lb)1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 20261.65 kg (3.64 lbs) with the keyboard attached. The global press release gives 1.35 kg without the keyboard.

1.2kg(2.6 lb)1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 20261.20 kg (2.65 lbs).

Lid material

Other2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Full Ceraluminum chassis. No enum option fits, so other is stored.

Aluminium4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Lid in Ceraluminum, a patented ceramic-coated aluminum. Main deck in CNC-machined aluminum. The bottom material is not stated.

Bottom material

Other2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Full Ceraluminum chassis. No enum option fits, so other is stored.

Not available

Max hinge angle

Not available

145°4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Opens to about 145 degrees.

MIL-STD-810 testing (claimed)iManufacturer claim of MIL-STD-810 testing. The revision and tested procedures belong in the source note. This is not proof of every standard test.

Yes1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026US MIL-STD 810H military-grade standard. Tests are not listed.

Yes1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026US MIL-STD 810H military-grade standard. Tested procedures are not listed.

Display

8 of 25 differ

Screen sizeiDiagonal of the main built-in display. Rounded-corner displays may be measured as a full rectangle.

14in(35.6 cm)1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Each of the two displays is 14 inch.

14in(35.6 cm)1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Native resolution

2880 × 1800px1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 20263K (2880 x 1800) OLED 16:10, each display.

2880 × 1800px1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Pixel density

242.6ppi=CalculatedFrom Screen size and Native resolution

242.6ppi=CalculatedFrom Screen size and Native resolution

Panel typeiDell's WVA means wide viewing angle and names no panel technology, so it is stored as IPS only when Dell or a review names IPS.

OLED1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

OLED1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Backlight

None (self-emissive)1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

None (self-emissive)1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Dimming zonesiIndependently controlled backlight zones, not the number of LEDs or screen pixels.

Not available

Not available

Panel part numberiPanel part number identified in a matching review unit. Suppliers may vary within the same laptop configuration.

Not available

Samsung SDC422A (ATNA40HQ05-0)4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Panel HardwareID Samsung SDC422A (ATNA40HQ05-0) on the reviewed unit. Suppliers may vary between units.

Screen surfaceiSurface of the stored display configuration. Anti-reflective coatings do not by themselves make a glossy display matte. A matte finish of the chassis is not the screen surface.

Not available

Glossy4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Glossy OLED touch panel.

Touchscreen

Yes1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

Yes1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Stylus

Included1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026With stylus support. The US bundle includes the ASUS Pen.

Supported1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026With stylus support. No stylus is listed in the box.

Refresh rate modesiHighest confirmed operating refresh rate of the built-in display at each resolution. Add a second row only for a documented dual-mode panel, not an ordinary supported timing.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Width (px)	Height (px)	Maximum operating refresh (Hz)	VRR
2880	1800	144	Yes

Source1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Both displays 144Hz. The global press release states 48-144Hz VRR.

BASUS Zenbook S 14 (2026) UX5406AA

Width (px)	Height (px)	Maximum operating refresh (Hz)
2880	1800	120

Source1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 20263K 2880 x 1800 OLED, Refresh Rate 120Hz. No variable refresh technology is listed. The 0.2ms response time is not stored because the page does not say gray-to-gray.

Max refresh rate

144Hz=CalculatedFrom Refresh rate modes

120Hz=CalculatedFrom Refresh rate modes

Adaptive synciNamed variable refresh technologies for the built-in display. Manual switching between 60Hz and 120Hz is not VRR.

Not available

Not available

Gray-to-gray response time (claimed)iManufacturer claim for a gray-to-gray pixel transition. Do not use generic response times, black-to-white values, or motion-picture response times.

Not available

Not available

Native panel colour depthiPhysical panel colour depth per channel. Do not infer native bit depth or FRC from the number of supported colours.

Not available

Not available

Brightness (SDR, claimed)iManufacturer typical SDR luminance. Outdoor maxima and an unspecified peak are not typical SDR brightness.

500nits1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026500nits SDR.

Not available

Peak brightness (SDR outdoors, claimed)iManufacturer maximum SDR luminance explicitly claimed for outdoor use. Ambient light, automatic brightness and other stated conditions belong in the source note. Not typical SDR or HDR brightness.

Not available

Not available

Sustained brightness (HDR, claimed)iManufacturer explicitly sustained HDR luminance. Screen area, duration, temperature and other stated conditions belong in the source note. Not a brief peak or SDR luminance.

Not available

Not available

Peak brightness (HDR, claimed)iManufacturer peak luminance explicitly measured or claimed in HDR. Window size and duration belong in the source note.

1,000nits1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 20261000nits HDR peak brightness. Window size is not stated.

1,100nits1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026500nits and 1100nits HDR peak brightness are listed. Only the HDR peak is stored. The 500nits figure is not labelled typical, so it is not stored as typical brightness.

sRGB coverage (claimed)iManufacturer stated sRGB gamut percentage. The source note identifies coverage, volume, or an unspecified maker gamut claim.

Not available

Not available

DCI-P3 coverage (claimed)iManufacturer stated DCI-P3 gamut percentage. The source note identifies coverage, volume, or an unspecified maker gamut claim.

100%1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026100% DCI-P3 color gamut.

100%1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026100% DCI-P3 color gamut. The page does not say coverage or volume.

Adobe RGB coverage (claimed)iManufacturer stated Adobe RGB gamut percentage. The source note identifies coverage, volume, or an unspecified maker gamut claim.

Not available

Not available

HDR certification

DisplayHDR True Black 10001Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026VESA CERTIFIED Display HDR True Black 1000.

DisplayHDR True Black 10001Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026VESA CERTIFIED Display HDR True Black 1000.

Factory calibratediThe maker explicitly states factory colour calibration. Certification alone does not establish calibration.

Not available

Not available

Second display

Screen size14 inResolution2880 × 1800 pxTouchscreenYes1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Dual 14 inch 3K OLED touch screens. The lower display is the second display.

Not available

Processor

1 of 14 differ

Processor

Intel Core Ultra 9 386H1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

Intel Core Ultra 9 386H1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Intel Core Ultra 9 Processor 386H 2.1 GHz (18MB Cache, up to 4.9 GHz, 16 cores, 16 Threads).

Processor brand

Intel1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

Intel1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Core configurationiProcessor core groups using the chip maker's names. MediaTek Big, Apple Super and AMD Zen architecture labels remain distinct from Intel P and E labels.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Core type	Count	Base clock (GHz)	Max clock (GHz)
Performance	4	2.1	4.9
Efficiency	8	1.6	3.7
Low-power efficiency	4	1.6	3.5

Source6Maker product pageintel.com/content/www/us/en/products/sku/245529/intel-core-ultra-9-processor-386h-18m-cache-up-to-4-90-ghz/specifications.htmlRead 13 October 20264 P-cores 2.1/4.9 GHz, 8 E-cores 1.6/3.7 GHz, 4 LP E-cores 1.6/3.5 GHz. Generic base 25 W and turbo 80 W are not the laptop limits.

BASUS Zenbook S 14 (2026) UX5406AA

Core type	Count	Base clock (GHz)	Max clock (GHz)
Performance	4	2.1	4.9
Efficiency	8	1.6	3.7
Low-power efficiency	4	1.6	3.5

Source3Maker product pageintel.com/content/www/us/en/products/sku/245529/intel-core-ultra-9-processor-386h-18m-cache-up-to-4-90-ghz/specifications.htmlRead 10 October 20264 P-cores 2.1 GHz base and 4.9 GHz max turbo, 8 E-cores 1.6 and 3.7 GHz, 4 LP E-cores 1.6 and 3.5 GHz, 16 threads. Generic 25 W base and 80 W maximum turbo power are not the laptop setting.

CPU cores

16=CalculatedFrom Core configuration

16=CalculatedFrom Core configuration

Cores labelled performanceiCounts only rows classified as performance. Other labels, including Big, Super and AMD Zen architecture rows, are not included.

4=CalculatedFrom Core configuration

4=CalculatedFrom Core configuration

Cores labelled efficiencyiCounts only efficiency and low-power-efficiency rows. AMD Zen 5c and Apple super cores are not included.

12=CalculatedFrom Core configuration

12=CalculatedFrom Core configuration

ThreadsiMaximum hardware threads of the processor, including simultaneous multithreading where supported.

166Maker product pageintel.com/content/www/us/en/products/sku/245529/intel-core-ultra-9-processor-386h-18m-cache-up-to-4-90-ghz/specifications.htmlRead 13 October 2026

163Maker product pageintel.com/content/www/us/en/products/sku/245529/intel-core-ultra-9-processor-386h-18m-cache-up-to-4-90-ghz/specifications.htmlRead 10 October 2026

Max boost clock

4.9GHz=CalculatedFrom Core configuration

4.9GHz=CalculatedFrom Core configuration

L3 cacheiL3 cache only. Do not copy a combined L2 plus L3 cache total. Qualcomm's total cache, such as 30 MB on Snapdragon X, is not L3, even when a laptop maker labels it L3.

18MB6Maker product pageintel.com/content/www/us/en/products/sku/245529/intel-core-ultra-9-processor-386h-18m-cache-up-to-4-90-ghz/specifications.htmlRead 13 October 202618 MB Intel Smart Cache.

18MB3Maker product pageintel.com/content/www/us/en/products/sku/245529/intel-core-ultra-9-processor-386h-18m-cache-up-to-4-90-ghz/specifications.htmlRead 10 October 202618 MB Intel Smart Cache. Launch date listed as Q1'26.

ProcessiProcess size class of the processor compute die in nm, as on CPUs: TSMC N3B is 3, Intel 7 is 10, Intel 4 is 7 and Intel 18A is 1.8. Marketing process names and other chiplet processes belong in the source note.

Not available

Not available

Sustained CPU power (configured)iThis laptop's sustained configured CPU power limit, such as PL1. A chip manufacturer's generic base power is not the laptop setting.

45W2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Up to 45W TDP sustained. The Engadget review also says ASUS limits the TDP to 45 watts.

Not available

Peak CPU power (configured)iThis laptop's configured short-duration CPU limit, such as PL2. Do not substitute generic processor maximum turbo power.

Not available

Not available

Combined CPU and GPU poweriMaker stated simultaneous CPU plus discrete-GPU budget for the exact configuration and power mode.

Not available

Not available

NPU performanceiNPU-only claimed operations per second. Excludes combined CPU, GPU and platform AI throughput. Precision belongs in the source note.

50TOPS1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

50TOPS1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Intel NPU up to 50TOPS.

Graphics

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Discrete GPUiA separate dedicated graphics processor is installed. Integrated or unified-memory graphics do not qualify.

No1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

No1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

GPU

Not available

Not available

GPU brand

Not available

Not available

VRAMiDedicated video memory of the installed discrete GPU. Shared system memory is excluded.

Not available

Not available

Max GPU power (TGP)iMaximum configured discrete-GPU power including Dynamic Boost. Mode and any maker qualification belong in the source note.

Not available

Not available

Dynamic BoostiMaximum additional GPU power shifted from the CPU through NVIDIA Dynamic Boost. This is part of maximum TGP, not extra to it. A figure written as "up to 115W Dynamic Boost" is the total, so it goes in gpu_tgp_max_w.

Not available

Not available

GPU boost clockiHighest maker configured GPU boost clock, including factory overclock where explicitly stated. Mode belongs in the source note.

Not available

Not available

GPU switchingiExplicit GPU display-routing or power-sharing features. Advanced Optimus includes hardware display multiplexing.

Not available

Not available

Integrated GPU

Intel Graphics1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Graphics row lists Intel Graphics and Intel Arc Graphics. The DS99T has the 386H with Intel Graphics.

Intel Graphics1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Graphics: Intel Graphics. No separate graphics chip is listed.

Memory

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Installed RAMiTotal installed RAM in this product configuration, not the maximum purchase option.

32GB1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

32GB1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 202632GB LPDDR5X on board. Max total system memory up to 32GB.

RAM type

LPDDR5X1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

LPDDR5X1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

RAM speediConfigured memory data rate in transfers per second. Do not treat the DRAM clock in MHz as the data rate.

Not available

8,533MT/s4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 202632 GB LPDDR5X-8533, soldered. The maker publishes no data rate.

Memory channelsiActive memory channels of the installed configuration, not the number of RAM modules or slots. One installed module is one channel. This holds for DDR5 too, whose two 32-bit subchannels on one module do not count as two channels. Soldered LPDDR memory counts in 64-bit units, so a 128-bit bus is 2 channels, even when a maker calls it quad-channel.

Not available

Not available

RAM upgradeiWhether the installed RAM is soldered, socketed in slots, or a mixture. Purchase-time configurations are not upgrades.

Soldered1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

Soldered1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026LPDDR5X on board.

Memory slotsiPhysical replaceable RAM module sockets grouped by type and occupancy. Clocked SO-DIMM uses CSODIMM. Soldered memory is excluded.

Not available

Not available

RAM slots

Not available

Not available

Free RAM slots

Not available

Not available

Maximum supported RAMiManufacturer supported maximum RAM, including purchase-time soldered options. Does not imply post-purchase upgradeability.

32GB1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Memory row: 32GB LPDDR5X on board, max total system memory up to 32GB.

32GB1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Storage

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Installed storageiTotal advertised installed storage in decimal GB. Convert 1TB to 1000GB, without changing an explicitly published 512GB value.

1TB1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

1TB1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Storage type

NVMe SSD1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

NVMe SSD1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Installed drive PCIe generationiPCIe generation of the installed drive. This may be lower than the slot capability.

41Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 20261TB M.2 NVMe PCIe 4.0 SSD.

41Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Storage slotsiPhysical storage connectors grouped by capability and occupancy. A slot accepting several drive lengths is one slot, not one per length.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Form factor	Interface	PCIe generation	PCIe lanes	Count	Occupied
M.2 2280	PCIe NVMe	4	4	1	Yes

Source1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Expansion slots row: 1x M.2 2280 PCIe 4.0x4 (includes used). The installed SSD uses it. Regional ASUS pages show the same row.

BASUS Zenbook S 14 (2026) UX5406AA

Form factor	Interface	PCIe generation	PCIe lanes	Count	Occupied
M.2 2280	PCIe NVMe	4	4	1	Yes

Source1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 20261x M.2 2280 PCIe 4.0x4 (includes used), 1TB M.2 NVMe PCIe 4.0 SSD installed.4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Single M.2 2280 slot for a 1 TB Samsung PM9C1b PCIe Gen 4 SSD.

M.2 slots

1=CalculatedFrom Storage slots

1=CalculatedFrom Storage slots

Free storage slots

0=CalculatedFrom Storage slots

0=CalculatedFrom Storage slots

Maximum slot PCIe generation

4=CalculatedFrom Storage slots

4=CalculatedFrom Storage slots

Ports

3 of 7 differ

PortsiPhysical laptop connectors grouped by type, protocol capability and side. One connector with several protocols is counted once.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Type	Version	Count	Maximum data rate (Gbps)	Thunderbolt or USB4	DP Alt Mode
USB-C	Thunderbolt 4	2	40	Thunderbolt 4	Yes
USB-A	USB 3.2 Gen 2	1	10	Not available	Not available
HDMI	HDMI 2.1 FRL	1	Not available	Not available	Not available
3.5 mm audio	Not available	1	Not available	Not available	Not available

Source1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026I/O row: 2x Thunderbolt 4 with support for display and power delivery (up to 40Gbps), 1x USB 3.2 Gen 2 Type-A, 1x 3.5mm combo audio jack. The press releases add 1x HDMI 2.1 FRL. Port sides are not published by the maker.

BASUS Zenbook S 14 (2026) UX5406AA

Type	Version	Count	Side	Maximum data rate (Gbps)	Thunderbolt or USB4	DP Alt Mode	Maximum charging input (W)
USB-C	Thunderbolt 4	2	Left	40	Thunderbolt 4	Yes	100
HDMI	HDMI 2.1 TMDS	1	Left	Not available	Not available	Not available	Not available
3.5 mm audio	Not available	1	Left	Not available	Not available	Not available	Not available
USB-A	USB 3.2 Gen 2	1	Right	10	Not available	Not available	Not available

Source1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 20262x Thunderbolt 4 with display and power delivery (data speed up to 40Gbps), 1x USB 3.2 Gen 2 Type-A (up to 10Gbps), 1x 3.5mm combo audio jack, 1x HDMI 2.1 TMDS. Fast-charge capable with a 100W USB-C power delivery adapter. Sides come from Ultrabookreview.4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Left: 2x USB-C Thunderbolt 4, HDMI 2.1 TMDS, 3.5 mm jack. Right: 1x USB-A 3.2 Gen 2.

USB-C ports

2=CalculatedFrom Ports

2=CalculatedFrom Ports

Thunderbolt

Yes=CalculatedFrom Ports

Yes=CalculatedFrom Ports

Highest HDMI version

HDMI 2.1 FRL=CalculatedFrom Ports

HDMI 2.1 TMDS=CalculatedFrom Ports

Card reader

No=CalculatedFrom Ports

No=CalculatedFrom Ports

Ethernet speed

Not available

Not available

Maximum USB-C charging inputiHighest confirmed charging power accepted by a USB-C port. This is separate from adapter rating and power delivered to peripherals.

Not available

100W=CalculatedFrom Ports

Wireless

2 of 5 differ

Wi-Fi

Wi-Fi 71Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

Wi-Fi 71Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Wi-Fi bandsiSupported radio frequency bands. Availability may be restricted by country or regulatory configuration.

2.4 GHz, 5 GHz, 6 GHz1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Wi-Fi 7 (802.11be) triple band 2*2. 6GHz availability varies by country.

2.4 GHz, 5 GHz, 6 GHz1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Wi-Fi 7 (802.11be) triple band 2*2 wireless card.

Wi-Fi module

Not available

Intel BE2014Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Intel BE201 Wi-Fi 7 (2x2).

BluetoothiThe version as a number with one decimal, such as 5.4 or 6.0. A qualifier such as or above goes in the source note.

5.41Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

6.01Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Bluetooth 6.0. Ultrabookreview says Bluetooth 5.4. The maker value is stored.

Cellular

Not available

Not available

Keyboard and touchpad

3 of 8 differ

Keyboard layoutsiDocumented layouts of the retained regional SKUs. Do not infer a layout solely from the sales country.

Not available

Not available

Key switches

Not available

Not available

Keyboard backlightiA maker-confirmed backlight with no published type uses backlit_unspecified. Do not infer white lighting, a single colour or RGB from backlit alone. A single-zone RGB backlight is RGB zones.

Backlit, type not stated1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Backlit chiclet soft keyboard. Zones and color are not stated.

Single colour4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026White backlight.

NumpadiDedicated physical numeric keypad. A virtual touchpad number pad is not counted.

Not available

Not available

Key traveliPhysical key travel distance, not actuation distance.

1.7mm1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Backlit Chiclet Soft Keyboard, 1.7mm key travel. The detachable keyboard is Bluetooth.

1.1mm1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Backlit Chiclet Keyboard, 1.1mm Key-travel.

Pointing stickiDedicated stick pointing device such as TrackPoint. A touchpad does not qualify.

Not available

Not available

Touchpad size

Width127Height79mm(5 × 3.1 in)2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026

Not available

Touchpad mechanismiA clickpad or glass touchpad that clicks when pressed down is mechanical. Haptic needs a source that says haptic or force feedback.

Not available

Not available

Camera and audio

4 of 7 differ

Webcam

FHD1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

1080p FHD1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026FHD camera with IR function to support Windows Hello.

IR face loginiAn infrared camera suitable for Windows Hello face authentication. An ordinary webcam or fingerprint sensor does not qualify.

Yes1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026FHD camera with IR function to support Windows Hello.

Yes1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 20264Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026IR camera for Windows Hello.

Webcam privacy

Not available

None4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026No privacy shutter.

Built-in speaker driversiIndividual built-in acoustic drivers, including separate tweeters and woofers. Do not count audio channels or infer driver count from speaker assemblies.

61Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026The product page says six speakers. The tech spec lists built-in speakers with Smart Amp Technology.

44Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Quad speakers: 2 woofers and 2 tweeters.

Total speaker poweriCombined published power of the built-in speaker drivers. RMS or peak classification belongs in the source note.

Not available

Not available

Audio features

Dolby Atmos, Smart Amp Technology1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Smart Amp Technology. Dolby Atmos is named in the press release and on the product page.

Smart Amp Technology, AI Noise Canceling1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Smart Amp Technology in the audio row and AI Noise Canceling in the MyASUS features list.

MicrophonesiPhysical built-in microphones, not beamforming channels or microphone modes.

Not available

Not available

Battery and power

3 of 5 differ

Battery energyiPublished nominal energy capacity of the installed internal battery in watt-hours. Separate from measured runtime and charger output.

99Wh1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

77Wh1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 202677WHrs, 4S1P, 4-cell Li-ion.

Claimed battery lifeiManufacturer maximum runtime for each explicitly named test. Display brightness, configuration and other conditions belong in the source note. Wireless streaming preserves an unnamed content type and does not imply video or audio. Video conferencing requires an explicit calling test, with application and participant setup in the source note. MobileMark versions use different workloads, so compare only rows of the same version.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Use case	Hours (h)
Video playback	32
Web browsing	18

Source2Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026Single screen up to 32 hours local video playback and 18 hours web browsing. With both displays up to 18 and 12 hours. ASUS test November 2025 on a UX8407AA with a 3K OLED, Intel Core Ultra X9, 2 TB SSD, 32 GB RAM, Balanced power plan, 150 cd/m2, 60 Hz, wallpaper on the second panel. The tested configuration differs from the DS99T.

BASUS Zenbook S 14 (2026) UX5406AA

Not available

Adapter rated outputiNominal rated output of the documented supplied or recommended adapter. A temporary dynamic maximum belongs in the source note. Not the laptop charging-input limit.

100W1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026TYPE-C, 100W AC Adapter, output 20V DC 5A.

68W1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026TYPE-C, 68W AC Adapter, 20V DC, 3.4A. Ultrabookreview calls it a 65 W charger. The maker value is stored. Whether a charger is included varies by country, region and model.

Laptop charging connectoriConnector at the laptop end of the documented main charging cable, not the wall plug or adapter-end connector. HP's AC smart pin is a round DC plug, so it is barrel.

USB-C1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

USB-C1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Type-C adapter with a Type-C cable.

Charge 0 to 50 % (claimed)iManufacturer time to charge an empty battery to 50%. Adapter and powered-off conditions belong in the source note.

Not available

Not available

Cooling

None of 4 known

FansiPhysical cooling fans inside the laptop. Excludes fans in external coolers and the power adapter.

Not available

Not available

Vapor chamberiA vapor-chamber heat spreader is installed. Ordinary heatpipes alone do not qualify.

Not available

Not available

Liquid metaliComponents where the maker confirms liquid-metal thermal material. Ordinary thermal paste is excluded.

Not available

Not available

Power modesiPublished laptop operating modes and configured power limits. Do not place observed runtime power measurements in this table.

Not available

Not available

Security

1 of 4 differ

Fingerprint

Not available

None4Reviewultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026No fingerprint sensor. IR camera for Windows Hello.

TPM

Not available

Not available

Remote management

Not available

Not available

Security lock slotiA dedicated built-in physical security-cable slot. Security locks that occupy a USB-C port do not qualify.

Not available

Not available

Software

0 of 3 differ

Operating system

Windows 11 Home1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Windows 11 Pro is also listed for the family. The DS99T row is Windows 11 Home.

Windows 11 Home1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Windows 11 Home.

OS family

Windows1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

Windows1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Security updates untiliPublished end date of OS/security updates promised for the exact device model. Preserve the source precision. Do not calculate it from years or substitute a generic OS-version lifecycle. Unknown when no device-specific promise is published.

Not available

Not available

Measured display

4 of 12 differ

Brightness (measured, centre)iReviewer center-point SDR luminance for the matching display configuration. Do not substitute a review average or unspecified measurement.

Not available

500.67nits5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Maximum center brightness 500.67 cd/m2 measured by the reviewer. Review unit UX5406AA with Core Ultra 9 386H, 32 GB RAM and 1 TB SSD.

Brightness (measured, average)iReviewer mean luminance across a documented display grid, normally nine points.

Not available

Not available

Contrast ratio (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

HDR peak brightness (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

sRGB coverage (measured)iReviewer measured sRGB coverage, not gamut volume. Instrument and method belong in the source note.

Not available

100%5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026100% sRGB.

DCI-P3 coverage (measured)iReviewer measured DCI-P3 coverage, not gamut volume. Display P3 measurements are identified in the source note.

Not available

100%5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026100% DCI-P3.

Colour accuracy (measured Delta E)iReviewer colour error before calibration. Delta-E formula, colour space and picture mode belong in the source note.

Not available

Not available

PWM flicker foundiWhether a reviewer detected pulse-width-modulation flicker under the documented test conditions. False does not prove all frequency ranges were tested.

Not available

Yes5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026PWM is present. The review gives no frequency or brightness range.

PWM frequency (measured)iDetected PWM frequency at the brightness setting stated by the reviewer.

Not available

Not available

PWM at or below brightnessiHighest display brightness setting at or below which the documented PWM is detected.

Not available

Not available

Response black to white (measured)iReviewer combined rise and fall response for black-to-white-to-black, with test conditions in the source note.

Not available

Not available

Response grey to grey (measured)iReviewer combined rise and fall response between specified grey levels. State the levels in the source note.

Not available

Not available

Measured performance

6 of 8 differ

Cinebench 2024 single-coreiMeasured by a reviewer, not claimed by the maker

Not available

123points5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Performance mode (28 W).

Cinebench 2024 multi-coreiMeasured by a reviewer, not claimed by the maker

Not available

922points5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 202610-minute run, Performance mode.

Geekbench 6 single-coreiMeasured by a reviewer, not claimed by the maker. Geekbench 6 only. Geekbench 5 and 7 use other scales, so their scores are not stored.

Not available

2,825points5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Geekbench 6.3.2, Performance mode.

Geekbench 6 multi-coreiMeasured by a reviewer, not claimed by the maker. Geekbench 6 only. Geekbench 5 and 7 use other scales, so their scores are not stored.

Not available

16,506points5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Geekbench 6.3.2, Performance mode.

3DMark Time Spy graphicsiMeasured by a reviewer, not claimed by the maker. Graphics score, not the overall score. A score the review does not label as graphics is left out.

Not available

3,095points5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Time Spy overall 3478, graphics 3095, CPU 11684. Performance mode.

3DMark Steel NomadiMeasured by a reviewer, not claimed by the maker

Not available

Not available

SSD sequential read (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Game frame ratesiMatching review-unit game results. Resolution, preset, upscaling, frame generation and ray tracing are stated only when documented.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Not available

BASUS Zenbook S 14 (2026) UX5406AA

Game	Width (px)	Height (px)	Preset	Average FPS	1 % low FPS
Cyberpunk 2077	1920	1200	Low	24	12
Far Cry 6	1920	1200	Low, TAA	46	Not available
Horizon Forbidden West	1920	1200	Very Low	48	Not available
Shadow of the Tomb Raider	1920	1200	Lowest	62	Not available
The Witcher 3	1920	1200	Low	77	Not available

Source5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 20261920x1200, Performance mode, average fps. The Cyberpunk 2077 result lists a 1% low. Settings as listed in the review.

Measured noise and temperature

2 of 9 differ

Fan noise per modeiReviewer sound-pressure readings for the matching configuration and mode. Measurement distance and workload belong in the source note.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Not available

BASUS Zenbook S 14 (2026) UX5406AA

Power mode	Load	Noise (dB(A))
Performance	Max load	45
Standard	Max load	35

Source5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Head-level noise by power mode from the review: Performance about 45 dBA, Standard about 35 dBA, Whisper under 30 dBA. The workload is not named, so max load is an assumption of the load class. Whisper is not stored.

Max fan noiseiMeasured by a reviewer, not claimed by the maker

Not available

45dB(A)=CalculatedFrom Fan noise per mode

Fan noise while gamingiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Top surface under loadiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Bottom surface under loadiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Palm rest under loadiMeasured by a reviewer, not claimed by the maker

Not available

Not available

CPU temperature in stress testiMeasured by a reviewer, not claimed by the maker

Not available

Not available

CPU clock in stress testiMeasured by a reviewer, not claimed by the maker

Not available

Not available

GPU temperature while gamingiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Measured battery and power

3 of 10 differ

Battery runtime per testiReviewer runtime for the exact test and configuration. Mixed browsing, video and graphics workloads are classified as mixed use.

AASUS Zenbook DUO (2026) UX8407AA-DS99T

Not available

BASUS Zenbook S 14 (2026) UX5406AA

Test	Brightness (nits)	Power mode	Hours (h)
Video streaming	120	Whisper	15

Source5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Netflix fullscreen in Edge, Whisper mode, screen at 50% (about 120 nits), 60 Hz on battery, Windows Best Power Efficiency, 5 W draw, about 15 hours.

Wi-Fi browsing runtimeiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Video runtimeiMeasured by a reviewer, not claimed by the maker

Not available

15h=CalculatedFrom Battery runtime per test

Full charge time (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Power draw idleiHighest reviewer idle AC power reading for the matching configuration and test conditions.

Not available

Not available

Power draw gamingiReviewer AC power draw during the named game and settings. Not GPU-only power.

Not available

Not available

Power draw maxiMaximum reviewer AC input power during the documented load or stress test. Not the adapter rating.

Not available

Not available

Sustained CPU power (measured)iObserved sustained CPU package power during the documented test. Not the configured PL1 limit.

Not available

28W5Measurementultrabookreview.com/74670-asus-zenbook-s14-gen2-reviewRead 10 October 2026Sustained power in Performance mode: 28 W. Standard about 17 W, Whisper about 12 W.

GPU power while gaming (measured)iObserved GPU-only power while running the documented game and settings.

Not available

Not available

Weight (measured)iReviewer measured laptop mass without its power adapter unless the source note explicitly states otherwise.

Not available

Not available

Certifications

1 of 6 differ

Intel EvoiManufacturer certification of the exact configuration as Intel Evo. Processor support alone does not establish certification.

Not available

Not available

Copilot+ PCiManufacturer identifies the configuration as Copilot+ PC. A Copilot keyboard key alone is insufficient.

Yes1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026The tech spec page title is ASUS Zenbook DUO (UX8407), Copilot+ PC.

Yes1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026The page title is ASUS Zenbook S14 (UX5406) Copilot+ PC.

Colour certifications

Pantone Validated1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026PANTONE Validated.

Pantone Validated1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026PANTONE Validated. The page does not say factory calibrated.

ENERGY STAR

Yes1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026Ecolabels and compliances: RoHS and Energy Star.

Yes1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Ecolabels and Compliances: REACH, RoHS, Energy star.

EPEAT

Not available

Not available

Other certifications

RoHS, Dolby Vision (displays)3Press releaseasus.com/us/news/the-all-new-zenbook-duo-is-now-available-for-pre-order-in-the-united-statesRead 13 October 2026The release calls the dual displays Dolby Vision-certified, with 48-144Hz VRR. RoHS is from the tech spec.

TÜV Rheinland-certified, SGS Eye Care Display1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026TÜV Rheinland-certified and SGS Eye Care Display, both listed in the display row.

In the box

1 of 2 differ

In the boxiAccessories confirmed for this exact SKU. Do not combine mutually exclusive regional bundles into one box.

ASUS Pen 3.0 stylus with wireless charger, ASUS Zenbook laptop sleeve3Press releaseasus.com/us/news/the-all-new-zenbook-duo-is-now-available-for-pre-order-in-the-united-statesRead 13 October 2026Bundle row: ASUS Pen 3.0 with Wireless Charger and ASUS Zenbook Laptop Sleeve. The ASUS tech spec lists the same two items and says accessories vary by country.

Sleeve1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026Sleeve. Included accessories vary according to country and territory.

Power adapter includediWhether a power adapter is included with this exact regional SKU. A supported or recommended adapter does not prove inclusion.

Not available

Not available

Warranty

1 of 2 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year5Maker product pageeshop.asus.com/us/90nb16v1-m00j80-asus-zenbook-duo-ux8407-copilot-pc.htmlRead 13 October 20261 year international manufacturer warranty plus 1 year accidental protection when registered within 60 days of purchase. The 1 year manufacturer term is stored.

Not available

Warranty serviceiDocumented manufacturer warranty service for the named market. Included paid service upgrades belong in the source note.

Not available

Not available

Links

Not compared

Product page

www.asus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux84072Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407Read 13 October 2026

www.asus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux54062Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406Read 10 October 2026ASUS Singapore product page of the Zenbook S 14 (UX5406) family.

Spec sheet

www.asus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspec1Maker product pageasus.com/us/laptops/for-home/zenbook/asus-zenbook-duo-ux8407/techspecRead 13 October 2026

www.asus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspec1Maker product pageasus.com/sg/laptops/for-home/zenbook/asus-zenbook-s-14-ux5406/techspecRead 10 October 2026

Manual

Not available

Not available

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Both are also in the API. Back to all laptops.