| Attribute |
Lenovo ThinkPad X1 Carbon (20KGS05000) × | 
Fujitsu LIFEBOOK U939X (VFY U939XM151SIT) × |
| General | | |
| Model | Lenovo ThinkPad X1 Carbon | Fujitsu LIFEBOOK U939X |
| Product code | 20KGS05000 | VFY U939XM151SIT |
| Design | | |
| Product colour | Black | Black |
| Form factor | Clamshell | Convertible (Folder) |
| Brand | Lenovo | Fujitsu |
| Family | ThinkPad | LIFEBOOK |
| Series | X | U |
| Model name | X1 Carbon | U939X |
| Part number | 20KGS05000 | VFY U939XM151SIT |
| Release year (year) | 2018 | 2019 |
| Processor | | |
| Processor family | 8th gen Intel Core i7 | 8th gen Intel Core i5 |
| Processor frequency (GHz) | 1.9 | 1.6 |
| Processor boost frequency (GHz) | 4.2 | 3.9 |
| Processor model | i7-8650U | i5-8265U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1356 | BGA 1528 |
| Processor cache (MB) | 8 | 6 |
| Memory | | |
| Internal memory type | LPDDR3-SDRAM | DDR3-SDRAM |
| Maximum internal memory (GB) | 16 | 16 |
| Memory clock speed (MHz) | 2,133 | 2,133 |
| Internal memory (GB) | 16 | 16 |
| Display | | |
| Display diagonal (inch) | 14 | 13.3 |
| Panel type | IPS | IPS |
| HD type | Wide Quad HD | Full HD |
| LED backlight | + | + |
| Touchscreen | - | + |
| Dual-screen | - | - |
| Display resolution | 2560 x 1440 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 |
| 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 | 4.1 | 5.0 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 2 | 2 |
| USB 3.x Type-C ports | 2 | 1 |
| Combo headphone/mic port | + | + |
| HDMI ports quantity | 1 | 1 |
| Audio | | |
| Audio chip | - | Realtek ALC255 |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera resolution (numeric) (MPixel) | 1 | - |
| Front camera resolution (pixels) | 1280 x 720 | - |
| Keyboard | | |
| Numeric keypad | - | - |
| Keyboard backlit | + | + |
| Full-size keyboard | - | + |
| Pointing device | ThinkPad UltraNav | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Pro | Windows 10 Pro |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 57 | 50 |
| Weight and dimensions | | |
| Weight (kg) | 1.13 | 0.98 |
| Height (mm) | 15.9 | 16.9 |
| Depth (mm) | 217.1 | 214.8 |
| Width (mm) | 323.5 | 309 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Cable lock slot | + | + |
| Fingerprint reader | + | + |
| Trusted platform module (TPM) | + | + |