| Attribute |
LG Gram 15Z990 (15Z990-V.AA52B) × | 
Lenovo Yoga YOGA Book (ZA150042TR) × |
| General | | |
| Model | LG Gram 15Z990 | Lenovo Yoga YOGA Book |
| Product code | 15Z990-V.AA52B | ZA150042TR |
| Design | | |
| Product colour | Silver | Black |
| Form factor | Clamshell | Convertible (Folder) |
| Brand | LG | Lenovo |
| Family | Gram | Yoga |
| Series | - | Book |
| Model name | 15Z990 | YOGA Book |
| Part number | 15Z990-V.AA52B | ZA150042TR |
| Market positioning | - | Business |
| Release year (year) | 2019 | 2019 |
| Processor | | |
| Processor manufacturer | - | Intel |
| Processor family | 8th gen Intel Core i5 | Intel Atom |
| Processor frequency (GHz) | 1.6 | 1.4 |
| Processor boost frequency (GHz) | 3.4 | 2.4 |
| Processor model | i5-8250U | x5-Z8550 |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 4 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1356 | BGA 1380 |
| Processor cache (MB) | 6 | 2 |
| Memory | | |
| Internal memory type | DDR4-SDRAM | LPDDR3-SDRAM |
| Maximum internal memory (GB) | 8 | 4 |
| Memory clock speed (MHz) | 2,400 | 1,600 |
| Internal memory (GB) | 8 | 4 |
| Display | | |
| Display diagonal (inch) | 15.6 | 10.1 |
| Panel type | IPS | IPS |
| HD type | Full HD | WUXGA |
| LED backlight | + | + |
| Touchscreen | - | + |
| Display resolution | 1920 x 1080 pixels | 1920 x 1200 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter | - | - |
| On-board graphics adapter base frequency (MHz) | - | 200 |
| Maximum on-board graphics adapter memory (GB) | - | 8 |
| On-board graphics adapter model | Intel UHD Graphics 620 | Intel HD Graphics 400 |
| Storage | | |
| Total storage capacity (GB) | 256 | 64 |
| Number of SSDs installed | 1 | - |
| SSD capacity (GB) | 256 | - |
| Card reader integrated | + | + |
| SSD form factor | M.2 | - |
| Storage media | SSD | eMMC |
| 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 | - | - |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.1 | 4.0 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 3 | - |
| USB 3.x Type-C ports | 1 | - |
| Combo headphone/mic port | + | + |
| Docking connector | - | - |
| USB Sleep-and-Charge | + | - |
| DVI port | - | - |
| HDMI ports quantity | 1 | - |
| Audio | | |
| Speaker power (W) | 1.5 | 1.5 |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera resolution (numeric) (MPixel) | - | 2 |
| Front camera HD type | HD | - |
| Front camera resolution (pixels) | 1280 x 720 | - |
| 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) | 72 | - |
| Battery capacity (mAh) | 9,360 | 8,500 |
| Battery life (max) (h) | 19 | 13 |
| Weight and dimensions | | |
| Weight (kg) | 1.09 | 0.69 |
| Height (mm) | 16.8 | 9.6 |
| Depth (mm) | 228.4 | 170.8 |
| Width (mm) | 357.6 | 256.6 |
| Power | | |
| AC adapter power (W) | 65 | - |
| Security | | |
| Cable lock slot | + | - |
| Trusted platform module (TPM) | + | - |