Side by side comparison and review of ASUS VivoBook S15 (S531FA) and ASUS 14 (X409UA). Compare dimensions, processors, batteries, storage capacities and other key specifications and features to simplify the choice of your perfect laptop. Our goal is to make it easier for you to decide on the laptop that will best meet your expectations by revealing the main differences between the products.
Advantages and disadvantages of ASUS VivoBook S15 (S531FA) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
large screen size
decent battery life
ample storage capacity
includes essential ports
mediocre display quality
heavy build
average processor
limited graphics performance
Advantages and disadvantages of ASUS 14 (X409UA) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
compact design
adequate performance
solid build quality
decent battery life
average display quality
limited storage capacity
no backlit keyboard
mediocre graphics performance
| DESIGN AND DIMENSIONS | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 35.72 cm x 23.03 cm x 1.8 cm | 32.5 cm x 21.6 cm x 2.29 cm |
| Weight | 1.8 kg | 1.6 kg |
| Colour | Gun metal | Slate grey |
| DISPLAY | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Screen Size (Type) | 15.6" | 14" |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| V-Sync Rate at Max Res. | 60 Hz | - |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 300 cd/m² | - |
| Colour Gamut | - | 45% NTSC |
| Features | Anti-glare, 178° horizontal and vertical viewing angle, NanoEdge display | Anti-glare |
| PROCESSOR | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| CPU | Intel Core i5 (8th Gen) 8265U / 1.6 GHz | Intel Core i3 (7th Gen) 7020U / 2.3 GHz |
|---|---|---|
| Max Turbo Speed | 3.9 GHz | - |
| Number of Cores | Quad-Core | Dual-Core |
| Cache | 6 MB | 3 MB |
| 64-bit Computing | Yes | Yes |
| Features | Intel Turbo Boost Technology 2.0 | - |
| MEMORY | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| RAM | 8 GB | 4 GB (provided memory is soldered) |
|---|---|---|
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2400 MHz | - |
| Rated Speed | 2400 MHz | - |
| Form Factor | - | SO-DIMM 260-pin |
| STORAGE | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 PCIe | 256 GB SSD M.2 PCIe 3.0 x2 - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics 620 | Intel HD Graphics 620 |
|---|---|---|
| Camera | Yes - HD | Yes - VGA |
| Camera Features | IR camera | - |
| Sound | Harman/kardon stereo speakers, array microphone | Speaker, microphone |
| Audio Features | ASUS SonicMaster, Smart Amplification technology | - |
| COMMUNICATIONS | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.2 | 802.11a/b/g/n/ac, Bluetooth 4.1 |
|---|
| BATTERY | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Technology | 3-cell | 3-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 42 Wh | 42 Wh |
| AC ADAPTER | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 45 Watt, 19 V, 2.47 A | 45 Watt, 19 V, 2.37 A |
| INPUT | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Type | Keyboard, touchpad | Keyboard, touchpad |
|---|---|---|
| Keyboard Backlight | Yes | - |
| Features | - | Chiclet keyboard |
| CONNECTIONS & EXPANSIONS | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Interfaces | HDMI 2 x USB 2.0 USB 3.1 Gen 1 Headphone/microphone combo jack USB-C 3.1 Gen 1 |
Headphone/microphone combo jack USB 3.1 Gen 1 2 x USB 2.0 USB-C 3.1 Gen 1 HDMI LAN |
|---|---|---|
| Memory Card Reader | Yes (microSD) | Yes (microSD) |
| SOFTWARE | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Operating System (OS) | Windows 10 Home | Windows 10 Home 64-bit Edition |
|---|
| MISCELLANEOUS | ASUS VivoBook S15 (S531FA) | ASUS 14 (X409UA) |
|---|
| Included Accessories | Power adapter | Power adapter |
|---|---|---|
| Features | ErgoLift | - |
| SAR Value | 0.584 W/kg (body), 0.584 W/kg (limb) | 0.196 W/kg (body), 0.196 W/kg (limb) |
| Model Number | EJ037T | EK035T |
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