| Attribute |
Lenovo IdeaPad 520S (81BL007RSP) × | 
ASUS ZenBook UX331UN-C4136R (UX331UN-C4136R) × |
| General | | |
| Model | Lenovo IdeaPad 520S | ASUS ZenBook UX331UN-C4136R |
| Product code | 81BL007RSP | UX331UN-C4136R |
| Design | | |
| Form factor | Clamshell | Clamshell |
| Brand | Lenovo | ASUS |
| Family | IdeaPad | ZenBook |
| Series | 500 | 13 |
| Model name | 520S | UX331UN-C4136R |
| Part number | 81BL007RSP | UX331UN-C4136R |
| Release year (year) | 2018 | 2018 |
| Processor | | |
| Processor family | 8th gen Intel Core i5 | 8th gen Intel Core i5 |
| Processor frequency (GHz) | 1.6 | 1.6 |
| Processor boost frequency (GHz) | 3.4 | 3.4 |
| Processor model | i5-8250U | i5-8250U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1356 | BGA 1356 |
| Processor cache (MB) | 6 | 6 |
| Memory | | |
| Internal memory type | DDR4-SDRAM | - |
| Maximum internal memory (GB) | 8 | 8 |
| Internal memory (GB) | 8 | 8 |
| Display | | |
| Display diagonal (inch) | 14 | 13.3 |
| Panel type | IPS | - |
| HD type | Full HD | Full HD |
| LED backlight | + | + |
| Touchscreen | - | + |
| Display resolution | 1920 x 1080 pixels | 1920 x 1080 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | - | NVIDIA GeForce MX150 |
| Discrete graphics memory type | - | GDDR5 |
| Discrete graphics adapter | + | + |
| Discrete graphics adapter memory (GB) | - | 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 | - |
| Card reader integrated | + | + |
| SSD form factor | - | M.2 |
| Storage media | SSD | SSD |
| Optical drive | - | - |
| Networking | | |
| Wi-Fi standards | | |
| Bluetooth | + | + |
| Ethernet LAN | - | - |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.1 | 4.2 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 1 | 2 |
| USB 3.x Type-C ports | 1 | 1 |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | 1 | - |
| Docking connector | - | - |
| USB Sleep-and-Charge | + | - |
| DVI port | - | - |
| HDMI ports quantity | 1 | 1 |
| Audio | | |
| Speaker power (W) | 2 | 1 |
| Built-in microphone | + | - |
| Camera | | |
| Front camera | + | + |
| Keyboard | | |
| Numeric keypad | - | - |
| Keyboard backlit | + | - |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Home | Windows 10 Pro |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 52 | 50 |
| Battery life (max) (h) | 12 | 14 |
| Weight and dimensions | | |
| Weight (kg) | 1.69 | 1.12 |
| Height (mm) | 19.3 | 13.9 |
| Depth (mm) | 236.5 | 216 |
| Width (mm) | 327 | 310 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Cable lock slot | + | + |
| Trusted platform module (TPM) | - | + |