•  Date Published: 07 Jul 2026
    • Intel Core Ultra 7 258V
    • Intel Arc Graphics 140V
    • 14.0″, 3K (2880 x 1800), 120 Hz, OLED
    • 500GB SSD
    • 32GB RAM
    • 1.20 kg (2.6 lbs)
    7.4
    TOTAL SCORE
    8.3 Portability Excellent
    10.0 Display EXCEPTIONAL
    6.5 For Work Good
    5.7 For Gaming Average

    Review

    ASUS Zenbook S 14 in-depth review

    The ASUS Zenbook S 14 UX5406 is not just an ultra-thin well-crafted laptop. The new Intel Lunar Lake CPUs power it (these are also known as Intel Core Ultra 200V or Core Ultra (Series 2)). You can choose from three chips with 17W base power and the top dog is a 30W model. The main focus here isn't top-of-the-line performance, this time it's all about efficiency and power management. Here, Intel ditches Hyper-Threading and that's why you get four P cores (Lion Cove) and the same amount of LP E cores (Skymont). Intel's Thread Director firmware hints to the OS about which and how many cores are best suited for each task and load. The LPDDR5x memory is placed onto the CPU which reduces latency and frees some space on the motherboard allowing the manufacturers to create even thinner devices. Th[...]

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    Pros

    • Superb OLED display with 100% sRGB and DCI-P3 coverage (SDC419D)
    • Infinite contrast ratio, 120Hz refresh rate, and 2880 x 1800 resolution (SDC419D)
    • 591 nits in HDR and 364 nits max brightness in SDR mode (SDC419D)
    • Tremendous color accuracy (SDC419D)
    • Quality Harman Kardon-certified four-speaker audio system with Dolby Atmos support
    • Vapor chamber cooling with two fans
    • Comfortable keyboard
    • Big and smooth touchpad
    • 1080p IR Web camera
    • Very good overall CPU and iGPU performance given the thin profile
    • The fans aren't too noisy in "Full-speed mode" mode during heavy loads
    • Up to 32GB of soldered LPDDR5x
    • Long battery life
    • The Core Ultra 7 258V can maintain 2.70 GHz / 3.35 GHz for the P and LP E cores in short loads
    • Great solid premium build quality
    • 2x Thunderbolt 4 ports + Type-C charging

    Cons

    • The P-core frequency drops down below the official base clock in long loads
    • Only one M.2 slot + soldered RAM

    Disassembly, maintenance and upgrade options

    Opening the DeviceUndo the 10 Torx-head screws securing the bottom panel. If you’re confident, the easiest way to start is from the cutouts. Insert a thin plastic tool at a 45-degree angle, with the top side pointing inside the bottom panel. Pop half of the plate by lifting the tool, then work your way around the sides, back, and front. Alternatively, pry the top two edges (but note the stiff internal clips), then continue with the back, sides, and front.More info: Be cautious not to insert the tool horizontally as it may damage the speakers. Here's the internal look o[...]

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    DISPLAY: 14.0-inch, 2880x1800, OLED

    • Name
    • Samsung ATNA40CU09-0 (SDC419D)
    • Diagonal
    • 14.0"
    • Pixel density
    • 242.59 ppi
    • Brightness
    • 364 cd/m2
    • sRGB
    • 100%
    • PWM frequency
    • No PWM (Flicker-Free)
    • Panel Type
    • OLED
    • Resolution
    • 2880x1800
    • Becomes "Retina" from
    • 14 inches (36 cm)
    • Contrast
    • infinite
    • dE Color Checker
    • 0.9
    • PWM Rating
    • 10.0: (safe)

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    Office Work

    Office Work should be used mostly by users who spend most of the time looking at pieces of text, tables or just surfing. This profile aims to deliver better distinctness and clarity by keeping a flat gamma curve (2.20), native color temperature and perceptually accurate colors.

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    This profile is aimed at designers who work with colors professionally, and for games and movies as well. Design and Gaming takes display panels to their limits, making them as accurate as possible in the sRGB IEC61966-2-1 standard for Web and HDTV, at white point D65.

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    Health-Guard eliminates the harmful Pulse-Width Modulation (PWM) and reduces the negative Blue Light which affects our eyes and body. Since it’s custom tailored for every panel, it manages to keep the colors perceptually accurate. Health-Guard simulates paper so the pressure on the eyes is greatly reduced.

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