| Processor | HP EliteBook 840 G3 T9X21EA | |
| Processor model | i5-6200U | |
| Processor series | Intel Core i5-6200 series | |
| Processor socket | LGA 1356 (Socket B2) | |
| Processor threads | 4 | |
| Processor cores | 2 | |
| Processor codename | Skylake | |
| Processor family | 6th gen Intel Core i5 | |
| Processor frequency | 2.3 GHz | |
| Processor boost frequency | 2.8 GHz | |
| Processor cache | 3 MB | |
| Thermal Design Power (TDP) | 15 W | |
| Software | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Operating system installed | Windows 7 Professional | |
| Recovery operating system | Windows 10 Pro | |
| Operating system architecture | 64-bit | |
| Display & Graphics | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Aspect ratio | 16:9 | |
| Display diagonal | 14 inch | |
| Display resolution | 1366 x 768 pixels | |
| LED backlight | Yes | |
| Touchscreen | No | |
| Discrete graphics adapter | No | |
| Discrete graphics adapter model | Not available | |
| Maximum on-board graphics adapter memory | 1.74 GB | |
| On-board graphics adapter | Yes | |
| On-board graphics adapter base frequency | 300 MHz | |
| On-board graphics adapter DirectX version | 12 | |
| On-board graphics adapter dynamic frequency (max) | 1000 MHz | |
| On-board graphics adapter family | Intel HD Graphics | |
| On-board graphics adapter model | Intel HD Graphics 520 | |
| On-board graphics adapter OpenGL | 4.4 | |
| Memory | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Internal memory | 4 GB | |
| Maximum internal memory | 16 GB | |
| Memory clock speed | 2133 MHz | |
| Memory layout (slots x size) | 1 x 4 GB | |
| Memory slots | 2x SO-DIMM | |
| Internal memory type | DDR4-SDRAM | |
| Storage | HP EliteBook 840 G3 T9X21EA | other notebooks |
| HDD capacity | 500 GB | |
| HDD interface | SATA | |
| HDD speed | 7200 RPM | |
| Storage media | HDD | |
| Number of HDDs installed | 1 | |
| Total HDDs capacity | 500 GB | |
| Total storage capacity | 500 GB | |
| Optical drive type | No | |
| Card reader integrated | Yes | |
| Compatible memory cards | SD, SDHC, SDXC | |
| Network & Communication | HP EliteBook 840 G3 T9X21EA | other notebooks |
| 3G | No | |
| 4G | No | |
| Bluetooth | Yes | |
| Bluetooth version | 4.2 | |
| Ethernet LAN | Yes | |
| Wi-Fi | Wi-Fi 5 (802.11ac) | |
| Wi-Fi standards | 802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n) | |
| Interfaces/Ports | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Charging port type | DC-in jack | |
| Combo headphone/mic port | Yes | |
| VGA (D-Sub) ports | 1 | |
| DisplayPorts quantity | 1 | |
| Docking connector | Yes | |
| DVI port | No | |
| Ethernet LAN (RJ-45) ports | 1 | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A | 2 | |
| Input Devices | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Keyboard backlit | Yes | |
| Numeric keypad | No | |
| Pointing device | Touchpad | |
| Spill resistant keyboard | Yes | |
| Audio | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Audio system | Bang & Olufsen | |
| Built-in microphone | Yes | |
| Number of speakers | 2 | |
| Built-in Devices | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Front camera | Yes | |
| Power | HP EliteBook 840 G3 T9X21EA | other notebooks |
| AC adapter power | 45 W | |
| Security | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Cable lock slot | Yes | |
| Fingerprint reader | Yes | |
| Trusted Platform Module (TPM) | Yes | |
| Design | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Brand | HP | |
| Family | EliteBook | |
| Series | 800 | |
| Model name | 840 G3 | |
| Part Number | T9X21EA | |
| Product type | Ultrabook | |
| Form factor | Clamshell | |
| Product colour | Silver | |
| Depth | 237 mm | |
| Width | 338 mm | |
| Height | 18.9 mm | |
| Weight | 1.54 kg | |
| Release Date | 2017-08-04 | |
| Battery Information | HP EliteBook 840 G3 T9X21EA | other notebooks |
| Battery capacity | 46 Wh | |
| Battery type | Lithium Polymer (LiPo) | |
| Number of battery cells | 3 | |
