| Attribute |
Fujitsu LIFEBOOK U939X (VFY U939XM151SIT) × | 
ASUS ZenBook UX431FA-AM025T (90NB0MB3-M02310) × |
| General | | |
| Model | Fujitsu LIFEBOOK U939X | ASUS ZenBook UX431FA-AM025T |
| Product code | VFY U939XM151SIT | 90NB0MB3-M02310 |
| Design | | |
| Product colour | Black | Blue |
| Form factor | Convertible (Folder) | Clamshell |
| Brand | Fujitsu | ASUS |
| Family | LIFEBOOK | ZenBook |
| Series | U | 14 |
| Model name | U939X | UX431FA-AM025T |
| Part number | VFY U939XM151SIT | 90NB0MB3-M02310 |
| Release year (year) | 2019 | 2019 |
| Processor | | |
| Processor family | 8th gen Intel Core i5 | 8th gen Intel Core i5 |
| Processor frequency (GHz) | 1.6 | 1.6 |
| Processor boost frequency (GHz) | 3.9 | 3.9 |
| Processor model | i5-8265U | i5-8265U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1528 | BGA 1528 |
| Processor cache (MB) | 6 | 6 |
| Memory | | |
| Internal memory type | DDR3-SDRAM | LPDDR3-SDRAM |
| Maximum internal memory (GB) | 16 | 8 |
| Memory clock speed (MHz) | 2,133 | 2,133 |
| Internal memory (GB) | 16 | 8 |
| Display | | |
| Display diagonal (inch) | 13.3 | 14 |
| Panel type | IPS | - |
| HD type | Full HD | Full HD |
| LED backlight | + | + |
| Touchscreen | + | - |
| Dual-screen | - | - |
| Display resolution | 1920 x 1080 pixels | 1920 x 1080 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter | - | - |
| On-board graphics adapter base frequency (MHz) | 300 | 300 |
| Maximum on-board graphics adapter memory (GB) | 32 | 32 |
| On-board graphics adapter model | Intel UHD Graphics 620 | Intel UHD Graphics 620 |
| Storage | | |
| Total storage capacity (GB) | 512 | 512 |
| Number of SSDs installed | 1 | 1 |
| SSD capacity (GB) | 512 | 512 |
| Card reader integrated | + | + |
| SSD form factor | M.2 | M.2 |
| Storage media | SSD | SSD |
| Optical drive | - | - |
| Networking | | |
| Wi-Fi standards | - 802.11a
- 802.11b
- 802.11g
- wi-fi 4 (802.11n)
- wi-fi 5 (802.11ac)
| - 802.11a
- 802.11b
- 802.11g
- wi-fi 4 (802.11n)
- wi-fi 5 (802.11ac)
|
| Bluetooth | + | + |
| Ethernet LAN | + | - |
| Ethernet LAN data rates (Mbit/s) | | - |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 5.0 | 4.2 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 2 | 1 |
| USB 3.x Type-C ports | 1 | 1 |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | - | 1 |
| DVI port | - | - |
| HDMI ports quantity | 1 | 1 |
| Audio | | |
| Audio chip | Realtek ALC255 | - |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Keyboard | | |
| Numeric keypad | - | - |
| Keyboard backlit | + | - |
| Full-size keyboard | + | + |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Pro | Windows 10 Home |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 50 | 47 |
| Weight and dimensions | | |
| Weight (kg) | 0.98 | 1.39 |
| Height (mm) | 16.9 | 15.9 |
| Depth (mm) | 214.8 | 212 |
| Width (mm) | 309 | 324 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Cable lock slot | + | - |
| Fingerprint reader | + | - |
| Trusted platform module (TPM) | + | - |