| Attribute |
LG Gram 15Z990 (15Z990-V.AA75B) × | 
LG 15U70N-J (15U70N-J.AA78B) × |
| General | | |
| Model | LG Gram 15Z990 | LG 15U70N-J |
| Product code | 15Z990-V.AA75B | 15U70N-J.AA78B |
| Design | | |
| Product colour | Silver | Silver |
| Form factor | Clamshell | Clamshell |
| Brand | LG | LG |
| Family | Gram | - |
| Model name | 15Z990 | 15U70N-J |
| Part number | 15Z990-V.AA75B | 15U70N-J.AA78B |
| Release year (year) | 2019 | 2020 |
| Processor | | |
| Processor manufacturer | - | Intel |
| Processor family | 8th gen Intel Core i7 | 10th gen Intel Core i7 |
| Processor frequency (GHz) | 1.8 | - |
| Processor boost frequency (GHz) | 4 | - |
| Processor model | i7-8550U | - |
| Processor cores | 4 | - |
| Processor threads | 8 | - |
| Processor lithography (Nm) | 14 | - |
| Processor cache (MB) | 8 | - |
| Memory | | |
| Internal memory type | DDR4-SDRAM | DDR4-SDRAM |
| Maximum internal memory (GB) | 8 | - |
| Memory clock speed (MHz) | 2,400 | 2,666 |
| Internal memory (GB) | 8 | 16 |
| Display | | |
| Display diagonal (inch) | 15.6 | 15.6 |
| Panel type | IPS | IPS |
| HD type | Full HD | WQXGA |
| LED backlight | + | - |
| Touchscreen | - | - |
| Display resolution | 1920 x 1080 pixels | 2560 x 1600 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | - | NVIDIA GeForce GTX 1050 |
| Discrete graphics memory type | - | GDDR5 |
| Discrete graphics adapter | - | + |
| Discrete graphics adapter memory (GB) | - | 3 |
| On-board graphics adapter model | 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)
| |
| Bluetooth | + | + |
| Ethernet LAN | - | + |
| Ethernet LAN data rates (Mbit/s) | - | |
| Wi-Fi | + | - |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.1 | - |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 3 | 2 |
| USB 3.x Type-C ports | 1 | 1 |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | - | 2 |
| USB Sleep-and-Charge | + | - |
| HDMI ports quantity | 1 | 1 |
| Ethernet LAN (RJ-45) ports | - | 1 |
| Audio | | |
| Speaker power (W) | 1.5 | - |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera HD type | HD | HD |
| Front camera resolution (pixels) | 1280 x 720 | - |
| Keyboard | | |
| Numeric keypad | + | + |
| Keyboard backlit | - | + |
| Full-size keyboard | - | + |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Home | Windows 10 Home |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 72 | 72 |
| Battery capacity (mAh) | 9,360 | 9,360 |
| Battery life (max) (h) | 19 | 16 |
| Weight and dimensions | | |
| Weight (kg) | 1.09 | 1.95 |
| Height (mm) | 16.8 | - |
| Depth (mm) | 228.4 | - |
| Width (mm) | 357.6 | - |
| Power | | |
| AC adapter power (W) | 65 | 120 |
| Security | | |
| Cable lock slot | + | + |
| Fingerprint reader | - | + |
| Trusted platform module (TPM) | + | + |