| Attribute |
HP ZBook 15 G2 (K1M93AW) × | 
HP ProBook 640 G1 Base Model (K9T78AV) × |
| General | | |
| Model | HP ZBook 15 G2 | HP ProBook 640 G1 Base Model |
| Product code | K1M93AW | K9T78AV |
| Design | | |
| Product colour | Black | Black, Silver |
| Form factor | Clamshell | Clamshell |
| Brand | HP | HP |
| Family | ZBook | ProBook |
| Series | 15 | 600 |
| Model name | 15 G2 | 640 G1 Base Model |
| Part number | K1M93AW | K9T78AV |
| Release year (year) | 2014 | 2015 |
| Processor | | |
| Processor family | 4th gen Intel Core i5 | 4th gen Intel Core i5 |
| Processor frequency (GHz) | 2.9 | 2.6 |
| Processor boost frequency (GHz) | 3.6 | 3.3 |
| Processor model | i5-4340M | i5-4300M |
| Processor cores | 2 | 2 |
| Processor threads | 4 | 4 |
| Processor lithography (Nm) | 22 | 22 |
| Processor socket | - | PGA946 |
| Processor cache (MB) | 3 | 3 |
| Memory | | |
| Internal memory type | DDR3L-SDRAM | DDR3-SDRAM |
| Maximum internal memory (GB) | - | 16 |
| Memory clock speed (MHz) | 1,600 | 1,600 |
| Internal memory (GB) | 4 | 4 |
| Display | | |
| Display diagonal (inch) | 15.6 | 14 |
| Panel type | SVA | SVA |
| HD type | Full HD | HD+ |
| LED backlight | + | + |
| Touchscreen | - | - |
| Display resolution | 1920 x 1080 pixels | 1600 x 900 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | NVIDIA Quadro K1100M | - |
| Discrete graphics memory type | GDDR5 | - |
| Discrete graphics adapter | + | - |
| Discrete graphics adapter memory (GB) | 2 | - |
| On-board graphics adapter base frequency (MHz) | 400 | 400 |
| Maximum on-board graphics adapter memory (GB) | 74 | 74 |
| On-board graphics adapter model | Intel HD Graphics 4600 | Intel HD Graphics 4600 |
| Storage | | |
| Total storage capacity (GB) | 500 | 500 |
| Card reader integrated | + | + |
| HDD capacity (GB) | 500 | 500 |
| Storage media | HDD | HDD |
| Optical drive | + | + |
| Networking | | |
| Wi-Fi standards | - 802.11a
- 802.11b
- 802.11g
- wi-fi 4 (802.11n)
- wi-fi 5 (802.11ac)
| - ieee 802.11a
- ieee 802.11b
- ieee 802.11g
- ieee 802.11n
|
| Bluetooth | + | + |
| Ethernet LAN | + | + |
| Ethernet LAN data rates (Mbit/s) | | |
| Wi-Fi | + | + |
| 3g | - | - |
| Bluetooth version | 4.0 | 4.0 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 3 | 4 |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | 1 | - |
| Docking connector | + | + |
| USB Sleep-and-Charge | + | + |
| DVI port | - | - |
| Ethernet LAN (RJ-45) ports | 1 | 1 |
| Audio | | |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera resolution (pixels) | - | 1280 x 720 |
| Keyboard | | |
| Numeric keypad | + | - |
| Keyboard backlit | + | + |
| Full-size keyboard | - | + |
| Pointing device | - | Touchpad |
| Software | | |
| Operating system installed | Windows 7 Professional | Windows 7 Professional |
| Operating system architecture (bit) | 64 | 32 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 83 | 55 |
| Weight and dimensions | | |
| Weight (kg) | 2.82 | 2 |
| Height (mm) | 30.5 | - |
| Depth (mm) | 257 | 237 |
| Width (mm) | 381.5 | 345 |
| Power | | |
| AC adapter power (W) | 150 | 65 |
| Security | | |
| Cable lock slot | + | + |
| Fingerprint reader | + | + |
| Trusted platform module (TPM) | + | + |