| Attribute |
Lenovo ThinkPad T580 (20L9004LIX) × | 
Lenovo IdeaPad S540 (81NG005RRU) × |
| General | | |
| Model | Lenovo ThinkPad T580 | Lenovo IdeaPad S540 |
| Product code | 20L9004LIX | 81NG005RRU |
| Design | | |
| Product colour | Black | Grey |
| Form factor | Clamshell | Clamshell |
| Brand | Lenovo | Lenovo |
| Family | ThinkPad | IdeaPad |
| Series | T | S |
| Model name | T580 | S540 |
| Part number | 20L9004LIX | 81NG005RRU |
| Market positioning | Business | - |
| Release year (year) | 2019 | 2020 |
| Processor | | |
| Processor manufacturer | - | Intel |
| Processor family | 8th gen Intel Core i5 | 10th gen Intel Core i5 |
| Processor frequency (GHz) | 1.6 | 1.6 |
| Processor boost frequency (GHz) | 3.4 | 4.2 |
| Processor model | i5-8250U | i5-10210U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1356 | BGA 1528 |
| Processor cache (MB) | 6 | 6 |
| Memory | | |
| Internal memory type | DDR4-SDRAM | DDR4-SDRAM |
| Maximum internal memory (GB) | 32 | 12 |
| Memory clock speed (MHz) | 2,400 | 2,400 |
| Internal memory (GB) | 8 | 12 |
| Display | | |
| Display diagonal (inch) | 15.6 | 15.6 |
| Panel type | IPS | 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 |
| 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 | - ieee 802.11a
- ieee 802.11ac
- ieee 802.11b
- ieee 802.11g
- ieee 802.11n
| |
| Bluetooth | + | + |
| Ethernet LAN | + | - |
| Ethernet LAN data rates (Mbit/s) | | - |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.2 | 4.2 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 2 | 2 |
| USB 3.x Type-C ports | 1 | 1 |
| Combo headphone/mic port | + | + |
| Docking connector | + | - |
| USB Sleep-and-Charge | + | + |
| HDMI ports quantity | 1 | 1 |
| Ethernet LAN (RJ-45) ports | 1 | - |
| Audio | | |
| Speaker power (W) | 2 | 2 |
| Audio chip | Realtek ALC3287 | - |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera resolution (numeric) (MPixel) | - | 1 |
| Front camera HD type | HD | HD |
| Front camera resolution (pixels) | 1280 x 720 | - |
| Keyboard | | |
| Numeric keypad | + | + |
| Keyboard backlit | + | + |
| Pointing device | ThinkPad UltraNav | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Pro | Windows 10 Home |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 56 | 52 |
| Battery life (max) (h) | 13.8 | 12 |
| Weight and dimensions | | |
| Weight (kg) | 1.95 | 1.95 |
| Depth (mm) | 252.8 | 245 |
| Width (mm) | 365.8 | 358 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Cable lock slot | + | - |
| Fingerprint reader | + | + |
| Trusted platform module (TPM) | + | + |