| Processor | HP ProBook 645 G4 3UN56EA | |
| Processor model | 2700U | |
| Processor threads | 8 | |
| Processor cores | 4 | |
| Processor family | AMD Ryzen 7 | |
| Processor frequency | 2.2 GHz | |
| Processor boost frequency | 3.8 GHz | |
| Processor cache | 2 MB | |
| Software | HP ProBook 645 G4 3UN56EA | other notebooks |
| Operating system installed | Windows 10 Pro | |
| Operating system architecture | 64-bit | |
| Display & Graphics | HP ProBook 645 G4 3UN56EA | other notebooks |
| Panel type | IPS | |
| Aspect ratio | 16:9 | |
| Display diagonal | 14 inch | |
| Display resolution | 1920 x 1080 pixels | |
| HD type | Full HD | |
| LED backlight | Yes | |
| Touchscreen | No | |
| Discrete graphics adapter | No | |
| Discrete graphics adapter model | Not available | |
| On-board graphics adapter | Yes | |
| On-board graphics adapter family | AMD Radeon RX Vega Graphics | |
| On-board graphics adapter model | AMD Radeon RX Vega 10 | |
| Memory | HP ProBook 645 G4 3UN56EA | other notebooks |
| Internal memory | 4 GB | |
| Maximum internal memory | 32 GB | |
| Memory clock speed | 2400 MHz | |
| Memory layout (slots x size) | 1 x 4 GB | |
| Memory form factor | SO-DIMM | |
| Memory slots | 2x SO-DIMM | |
| Internal memory type | DDR4-SDRAM | |
| Storage | HP ProBook 645 G4 3UN56EA | 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 | MicroSD (TransFlash) | |
| Network & Communication | HP ProBook 645 G4 3UN56EA | other notebooks |
| Antenna type | 2x2 | |
| 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 ProBook 645 G4 3UN56EA | other notebooks |
| HDMI version | 1.4 | |
| HDMI ports quantity | 1 | |
| Charging port type | DC-in jack | |
| Combo headphone/mic port | Yes | |
| VGA (D-Sub) ports | 1 | |
| Docking connector | Yes | |
| Ethernet LAN (RJ-45) ports | 1 | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A | 3 | |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-C | 1 | |
| Input Devices | HP ProBook 645 G4 3UN56EA | other notebooks |
| Numeric keypad | No | |
| Pointing device | Clickpad | |
| Windows keys | Yes | |
| Audio | HP ProBook 645 G4 3UN56EA | other notebooks |
| Built-in microphone | Yes | |
| Number of speakers | 2 | |
| Built-in Devices | HP ProBook 645 G4 3UN56EA | other notebooks |
| HP speaker type | HP Dual Speakers | |
| HP front camera | HP Webcam | |
| Front camera | Yes | |
| Front camera HD type | HD | |
| Front camera signal format | 720p | |
| Security | HP ProBook 645 G4 3UN56EA | other notebooks |
| Trusted Platform Module (TPM) | Yes | |
| Design | HP ProBook 645 G4 3UN56EA | other notebooks |
| Brand | HP | |
| Family | ProBook | |
| Series | 600 | |
| Model name | 645 G4 | |
| Part Number | 3UN56EA | |
| Product type | Notebook | |
| Form factor | Clamshell | |
| Product colour | Silver | |
| EAN/UPC code | 0192545244947, 0192545241465 | |
| Depth | 240 mm | |
| Width | 340 mm | |
| Height | 20.9 mm | |
| Weight | 1.73 kg | |
| Release Date | 2018-05-11 | |
| Battery Information | HP ProBook 645 G4 3UN56EA | other notebooks |
| Battery capacity | 48 Wh | |
| Battery type | Lithium-Ion (Li-Ion) | |
| Number of battery cells | 3 | |
