| Attribute |
ASUS X540UB-GQ351T (X540UB-GQ351T) × | 
ASUS X540UB-GQ490T (90NB0IM1-M06760) × |
| General | | |
| Model | ASUS X540UB-GQ351T | ASUS X540UB-GQ490T |
| Product code | X540UB-GQ351T | 90NB0IM1-M06760 |
| Design | | |
| Product colour | Black, Chocolate | Black, Chocolate |
| Form factor | Clamshell | Clamshell |
| Brand | ASUS | ASUS |
| Model name | X540UB-GQ351T | X540UB-GQ490T |
| Part number | X540UB-GQ351T | 90NB0IM1-M06760 |
| Release year (year) | 2019 | 2019 |
| Processor | | |
| Processor family | 8th gen Intel Core i7 | 8th gen Intel Core i5 |
| Processor frequency (GHz) | 1.8 | 1.6 |
| Processor boost frequency (GHz) | 4 | 3.4 |
| Processor model | i7-8550U | i5-8250U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1356 | BGA 1356 |
| Processor cache (MB) | 8 | 6 |
| Memory | | |
| Internal memory type | DDR4-SDRAM | DDR4-SDRAM |
| Maximum internal memory (GB) | 12 | 12 |
| Memory clock speed (MHz) | 2,133 | 2,133 |
| Internal memory (GB) | 8 | 8 |
| Display | | |
| Display diagonal (inch) | 15.6 | 15.6 |
| HD type | HD | HD |
| LED backlight | + | + |
| Touchscreen | - | - |
| Display resolution | 1366 x 768 pixels | 1366 x 768 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | NVIDIA GeForce MX110 | NVIDIA GeForce MX110 |
| Discrete graphics memory type | GDDR5 | GDDR5 |
| Discrete graphics adapter | + | + |
| Discrete graphics adapter memory (GB) | 2 | 2 |
| 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) | 256 | 256 |
| Number of SSDs installed | 1 | 1 |
| SSD capacity (GB) | 256 | 256 |
| Card reader integrated | + | + |
| Storage media | SSD | SSD |
| Optical drive | + | - |
| Networking | | |
| Wi-Fi standards | | - 802.11b
- 802.11g
- wi-fi 4 (802.11n)
|
| Bluetooth | + | - |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.2 | - |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 1 | 1 |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | 2 | 2 |
| HDMI ports quantity | 1 | 1 |
| Audio | | |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Keyboard | | |
| Numeric keypad | + | + |
| Full-size keyboard | - | + |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Home | Windows 10 Home |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 33 | 33 |
| Weight and dimensions | | |
| Weight (kg) | 1.9 | 1.9 |
| Height (mm) | 27.2 | 27.2 |
| Depth (mm) | 251 | 251 |
| Width (mm) | 381 | 381 |
| Security | | |
| Cable lock slot | - | + |