| Attribute |
Dynabook Portégé X40-G1438 (PMR41U-004002) × | 
Lenovo IdeaPad C340 (81N400LQUE) × |
| General | | |
| Model | Dynabook Portégé X40-G1438 | Lenovo IdeaPad C340 |
| Product code | PMR41U-004002 | 81N400LQUE |
| Design | | |
| Product colour | Blue | Blue |
| Form factor | Clamshell | Convertible (Folder) |
| Brand | Dynabook | Lenovo |
| Family | Portégé | IdeaPad |
| Series | - | C |
| Model name | X40-G1438 | C340 |
| Part number | PMR41U-004002 | 81N400LQUE |
| Release year (year) | 2020 | 2020 |
| Processor | | |
| Processor manufacturer | Intel | Intel |
| Processor family | 10th gen Intel Core i7 | 8th gen Intel Core i5 |
| Processor frequency (GHz) | 1.8 | 1.6 |
| Processor boost frequency (GHz) | 4.9 | 3.9 |
| Processor model | i7-10510U | i5-8265U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1528 | BGA 1528 |
| Processor cache (MB) | 8 | 6 |
| Memory | | |
| Internal memory type | DDR4-SDRAM | DDR4-SDRAM |
| Maximum internal memory (GB) | 32 | 16 |
| Memory clock speed (MHz) | 2,666 | 2,666 |
| Internal memory (GB) | 16 | 8 |
| Display | | |
| Display diagonal (inch) | 14 | 14 |
| Panel type | IPS | 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 MX230 |
| 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 | 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 | - |
| 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)
- wi-fi 6 (802.11ax)
| |
| Bluetooth | + | + |
| Ethernet LAN | - | - |
| Bluetooth version | - | 4.2 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 1 | 2 |
| USB 3.x Type-C ports | 2 | 1 |
| Combo headphone/mic port | - | + |
| USB Sleep-and-Charge | + | + |
| HDMI ports quantity | 1 | 1 |
| Audio | | |
| Speaker power (W) | - | 2 |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera HD type | - | HD |
| Keyboard | | |
| Numeric keypad | - | - |
| Keyboard backlit | + | + |
| Pointing device | Clickpad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Pro | Windows 10 Home |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 48 | 45 |
| Battery life (max) (h) | - | 8 |
| Weight and dimensions | | |
| Weight (kg) | 1.25 | 1.65 |
| Height (mm) | 16.9 | 17.9 |
| Depth (mm) | 228.9 | 229 |
| Width (mm) | 332 | 328 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Cable lock slot | + | - |
| Fingerprint reader | + | + |
| Trusted platform module (TPM) | + | + |