| Processor | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Processor model | i7-8550U | i5-6200U |
| Processor threads | 8 | 4 |
| Processor series | | Intel Core i5-6200 series |
| Processor cores | 4 | 2 |
| Processor socket | | LGA 1356 (Socket B2) |
| Processor family | 8th gen Intel Core i7 | 6th gen Intel Core i5 |
| Processor frequency | 1.8 GHz | 2.3 GHz |
| Processor boost frequency | 4 GHz | 2.8 GHz |
| Processor codename | | Skylake |
| Processor cache | 8 MB | 3 MB |
| Thermal Design Power (TDP) | | 15 W |
| Software | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Operating system installed | Windows 10 Home | Windows 10 Pro |
| Operating system architecture | 64-bit | 64-bit |
| Display & Graphics | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Panel type | IPS | IPS |
| Aspect ratio | 16:9 | 16:9 |
| Display brightness | 300 cd/m? | |
| Display diagonal | 15.6 inch | 15.6 inch |
| Display resolution | 1920 x 1080 pixels | 1920 x 1080 pixels |
| HD type | Full HD | Full HD |
| LED backlight | Yes | Yes |
| sRGB coverage | 96% | |
| Touchscreen | No | No |
| Discrete graphics adapter | No | No |
| Discrete graphics adapter model | Not available | Not available |
| On-board graphics adapter | Yes | Yes |
| On-board graphics adapter family | Intel UHD Graphics | Intel HD Graphics |
| On-board graphics adapter model | Intel UHD Graphics 620 | Intel HD Graphics 520 |
| Maximum on-board graphics adapter memory | | 1.74 GB |
| Number of displays supported | | 3 |
| On-board graphics adapter base frequency | | 300 MHz |
| On-board graphics adapter dynamic frequency (max) | | 1000 MHz |
| On-board graphics adapter OpenGL | | 4.4 |
| Memory | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Internal memory | 8 GB | 8 GB |
| Maximum internal memory | 8 GB | 16 GB |
| Memory clock speed | 2400 MHz | 1600 MHz |
| Memory layout (slots x size) | 1 x 8 GB | 1 x 8 GB |
| Memory form factor | SO-DIMM | |
| Memory slots | 1x SO-DIMM | 2x SO-DIMM |
| Internal memory type | DDR4-SDRAM | DDR3L-SDRAM |
| Storage | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| SSD capacity | 256 GB | 256 GB |
| SSD interface | Micro Serial ATA III | |
| SSD form factor | M.2 | |
| Storage media | SSD | SSD |
| Number of SSDs installed | 1 | 1 |
| Total SSDs capacity | 256 GB | |
| Total storage capacity | 256 GB | 256 GB |
| Optical drive type | No | DVD Super Multi DL |
| Card reader integrated | Yes | Yes |
| Compatible memory cards | MicroSD (TransFlash) | MMC, SD, SDHC, SDXC |
| Network & Communication | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| 3G | No | No |
| 4G | No | No |
| Antenna type | 2x2 | |
| Bluetooth | Yes | Yes |
| Bluetooth version | 4.1 | 4.1 |
| Ethernet LAN | No | Yes |
| Wi-Fi | Wi-Fi 5 (802.11ac) | Yes |
| Wi-Fi standards | 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) | IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n |
| WLAN | Intel Dual Band Wireless-AC 8265 | |
| Interfaces/Ports | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| HDMI ports quantity | 1 | 1 |
| Charging port type | DC-in jack | |
| Combo headphone/mic port | Yes | Yes |
| Headphone outputs | | 1 |
| USB 3.0 (3.1 Gen 1) Type-A | 3 | 4 |
| USB 3.0 (3.1 Gen 1) Type-C | 1 | |
| DC-in jack | | Yes |
| USB Sleep-and-Charge | 1 | 1 |
| VGA (D-Sub) ports | | 1 |
| Docking connector | | Yes |
| Ethernet LAN (RJ-45) ports | | 1 |
| Microphone in | | Yes |
| Input Devices | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Numeric keypad | Yes | Yes |
| Pointing device | Touchpad | Clickpad |
| Windows keys | Yes | Yes |
| Keyboard backlit | | Yes |
| Keyboard number of keys | | 102 |
| Audio | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Audio system | DTS Headphone: X | DTS Studio Sound |
| Built-in microphone | Yes | Yes |
| Number of speakers | 2 | |
| Number of microphones | 2 | |
| Speaker power | 1.5 W | |
| Built-in Devices | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Front camera | Yes | Yes |
| Front camera HD type | HD | |
| Front camera resolution | 1280 x 720 pixels | |
| Front camera signal format | 720p | |
| Power | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| AC adapter power | 65 W | |
| AC adapter input voltage | | 100 - 240 V |
| AC adapter output current | | 2.37 A |
| AC adapter output voltage | | 19 V |
| Security | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Cable lock slot | Yes | Yes |
| Cable lock slot type | Kensington | Kensington |
| Password protection | Yes | |
| Trusted Platform Module (TPM) | Yes | |
| Fingerprint reader | | Yes |
| Design | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Brand | LG | Toshiba |
| Family | Gram | Tecra |
| Model name | 15Z990 | Z50-C-143 |
| Part Number | 15Z990-V.AA78B | PT571E-06H03QEN |
| Product type | Notebook | Notebook |
| Form factor | Clamshell | Clamshell |
| Product colour | Silver | |
| Depth | 228.4 mm | 258 mm |
| Width | 357.6 mm | 379 mm |
| Colour of product | | Metallic |
| Height | 16.8 mm | 23.2 mm |
| Weight | 1.09 kg | 2.2 kg |
| Release Date | 2019-03-13 | 2018-01-10 |
| Battery Information | LG Gram 15Z990 15Z990-V.AA78B | Toshiba Tecra Z50-C-143 PT571E-06H03QEN |
| Battery capacity | 9360 mAh | |
| Battery type | Lithium Polymer (LiPo) | Lithium-Ion (Li-Ion) |
| Battery life | 19 h | 8 h |
| Number of battery cells | 4 | 4 |
