ASUS Zenbook DUO (UX8407) vs Lenovo ThinkPad T440

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Zenbook DUO (UX8407) compared with ThinkPad T440

	ASUSZenbook DUO (UX8407)	LenovoThinkPad T440
Overview
Released
Released	February 2026	October 2013
Display
Screen size
Screen size	14″	14″
Resolution
Resolution	2880 × 1800 (better)	1366 × 768 or 1600 × 900
Panel
Panel	OLED	–
Refresh rate
Refresh rate	144 Hz	–
Brightness
Brightness	500 nits (better)	200 nits or 250 nits
HDR peak brightness
HDR peak brightness	1,000 nits	–
Touchscreen
Touchscreen	Yes	No or Yes
Display type
Display type	Two 14-inch 3K ASUS Lumina Pro OLED touch screens, 16:10, stylus support	14-inch HD (1366 × 768, 200 nits, 350:1 contrast) or HD+ (1600 × 900, 250 nits, 400:1 contrast); optional ten-finger touch
Colour range
Colour range	100% DCI-P3	–
Screen finish
Screen finish	Anti-reflection coating (65% less reflection)	Anti-glare
Display features
Display features	0.2 ms response; 1,000,000:1 contrast; VESA DisplayHDR True Black 1000; 1.07 billion colours; PANTONE Validated; 93% screen-to-body ratio; E-Reading mode	–
Performance
Processor
Processor	Intel Core Ultra 9 386H, Intel Core Ultra X9 378H or Intel Core Ultra X9 388H	Intel Core i5-4200U or Intel Core i5-4300U
CPU cores
CPU cores	16	2
CPU threads
CPU threads	16	4
Graphics
Graphics	Intel Graphics or Intel Arc B390 GPU	Intel HD Graphics 4400
AI engine (NPU)
AI engine (NPU)	50 TOPS	–
Memory
Memory	32 GB (better)	4 GB or 8 GB
Storage
Storage	1 TB to 2 TB (better)	256 GB to 500 GB
CPU
CPU	Core Ultra X9 388H or 378H, Core Ultra X7 358H or Core Ultra 9 386H with 4 P-cores, 8 E-cores and 4 LP E-cores (18 MB cache); Core Ultra 7 355 with 4 P-cores and 4 LP E-cores (12 MB cache)	Fourth-generation Intel Core i3, i5 and i7 dual-core low-voltage processors; SoC platform
GPU
GPU	Intel Arc B390 GPU (Core Ultra X7 and X9) or Intel Graphics, integrated	Integrated Intel HD Graphics 4400; optional NVIDIA GeForce GT 720M with 1 GB and Optimus
AI engine
AI engine	Copilot+ PC; Intel NPU up to 50 TOPS	–
Memory type
Memory type	LPDDR5X on board, 16 or 32 GB, not upgradable	DDR3L-1600; one SO-DIMM socket, up to 8 GB, or 12 GB on selected models with 4 GB soldered
Storage type
Storage type	One M.2 2280 PCIe 4.0 x4 slot; 512 GB, 1 TB or 2 TB NVMe SSD	Removable 2.5-inch SATA HDD, SSD or SSHD; optional M.2 SSD shares space with WWAN or smart card reader, depending on slot
Battery and size
Battery life (maker's claim)
Battery life (maker's claim)	Up to 32 hours	Up to 8.6 hours
Battery capacity
Battery capacity	99 Wh	–
Weight
Weight	1.65 kg (better)	1.72 kg
Thickness
Thickness	23.4 mm	21 mm (better)
Width × depth
Width × depth	310.1 × 208.6 mm	339 × 232.5 mm
Battery life detail
Battery life detail	99 Wh, 4-cell Li-ion; 1080p video up to 32 hr (one screen) or 18 hr (two screens); web browsing up to 18 hr (one screen) or 12 hr (two screens); ASUS test at 150 nits and 60 Hz	Optional internal 23.5 Wh battery; removable external 23.5 Wh, 47.5 Wh or 72 Wh battery; integrated graphics, internal plus 23.5 Wh external up to 8.6 hours, plus 47.5 Wh up to 12.9 hours, plus 72 Wh up to 17.2 hours; Optimus up to 7.7 / 11.6 / 15.4 hours; weight shown with internal and three-cell external batteries, non-touch
Charger
Charger	100 W USB-C adapter; not included in every country	45 W; 65 W on optional GeForce GT 720M models
Fast charging
Fast charging	60% in 49 minutes	–
Materials
Materials	Ceraluminum chassis, hinge and kickstand; MIL-STD-810H tested	Glass-fibre reinforced plastic
Colours
Colours	Moher Gray	Black
Connections
Ports
Ports	2 × Thunderbolt 4, USB-A, HDMI, headphone jack	2 × USB-A, Ethernet, SD card slot, headphone jack
Wi-Fi
Wi-Fi	Wi-Fi 7	802.11b/g/n or 802.11a/b/g/n; optional 802.11ac
Bluetooth
Bluetooth	5.4	Optional Bluetooth 4.0
Webcam
Webcam	FHD with IR	Optional 720p
Operating system
Operating system	Windows	Windows
Port detail
Port detail	2 × Thunderbolt 4 (40 Gbps, display and power delivery); USB-A 10 Gbps; HDMI 2.1 FRL; 3.5 mm combo audio jack	Two USB 3.0 (one Always On), VGA, Mini DisplayPort, Gigabit Ethernet, combo audio jack, SD/MMC/SDHC/SDXC reader, optional smart card and SIM slot; docking connector on integrated graphics models
External displays
External displays	Two 4K 60 Hz or one 8K 60 Hz over Thunderbolt 4	Three independent displays; Mini DisplayPort up to 3840 × 2160 at 30 Hz on integrated graphics; VGA up to 1920 × 1200 at 60 Hz; Optimus DisplayPort up to 2560 × 1600 at 60 Hz
Keyboard
Keyboard	Detachable Bluetooth keyboard, backlit, 1.7 mm key travel, Copilot key; attaches magnetically to the lower screen with pogo pins	Six-row spill-resistant keyboard; TrackPoint; optional backlight
Trackpad
Trackpad	ErgoSense precision touchpad on the keyboard	UltraNav multi-touch touchpad; five buttons integrated into the clickpad
Speakers
Speakers	Six speakers with dedicated tweeters and woofers, Smart Amp	1 W × 2 stereo speakers
Microphones
Microphones	Array microphone	Dual-array microphone
Biometrics
Biometrics	IR camera for Windows Hello	Optional swipe fingerprint reader; TPM 1.2
In the box
In the box	ASUS Pen with wireless charger in some countries	–