| Attribute |
HP ProBook 4540s (B6M85EA) × | 
HP ProBook 4540s (B6M11EA) × |
| General | | |
| Model | HP ProBook 4540s | HP ProBook 4540s |
| Product code | B6M85EA | B6M11EA |
| Design | | |
| Product colour | Black, Silver | Silver |
| Form factor | Clamshell | Clamshell |
| Brand | HP | HP |
| Family | ProBook | ProBook |
| Series | 4000 | 4000 |
| Model name | 4540s | 4540s |
| Part number | B6M85EA | B6M11EA |
| Release year (year) | 2012 | 2012 |
| Processor | | |
| Processor manufacturer | - | Intel |
| Processor family | 2nd gen Intel Core i5 | 2nd gen Intel Core i5 |
| Processor frequency (GHz) | 2.5 | 2.5 |
| Processor boost frequency (GHz) | 3.1 | 3.1 |
| Processor model | i5-2450M | i5-2450M |
| Processor cores | 2 | 2 |
| Processor threads | 4 | 4 |
| Processor lithography (Nm) | 32 | 32 |
| Processor cache (MB) | 3 | 3 |
| Memory | | |
| Internal memory type | DDR3-SDRAM | DDR3-SDRAM |
| Maximum internal memory (GB) | 8 | - |
| Memory clock speed (MHz) | 1,333 | 1,333 |
| Internal memory (GB) | 4 | 4 |
| Display | | |
| Display diagonal (inch) | 15.6 | 15.6 |
| HD type | HD | HD |
| LED backlight | + | + |
| Touchscreen | - | - |
| Display resolution | 1366 x 768 pixels | 1366 x 768 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | AMD Radeon HD 7650M | AMD Radeon HD 7650M |
| Discrete graphics memory type | GDDR3 | GDDR3 |
| Discrete graphics adapter | + | + |
| On-board graphics adapter base frequency (MHz) | 650 | 650 |
| On-board graphics adapter model | Intel HD Graphics 3000 | Intel HD Graphics 3000 |
| 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 | - 802.11b
- 802.11g
- wi-fi 4 (802.11n)
| - 802.11b
- 802.11g
- wi-fi 4 (802.11n)
|
| Bluetooth | + | + |
| Ethernet LAN | + | + |
| Ethernet LAN data rates (Mbit/s) | | |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.0 EDR | 4.0 EDR |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 2 | 2 |
| Combo headphone/mic port | - | - |
| USB 2.0 ports | 2 | 2 |
| DVI port | - | - |
| HDMI ports quantity | 1 | 1 |
| Ethernet LAN (RJ-45) ports | 1 | 1 |
| Audio | | |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | - |
| Keyboard | | |
| Numeric keypad | + | + |
| Full-size keyboard | + | + |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 7 Professional | Windows 7 Professional |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 47 | 47 |
| Battery life (max) (h) | - | 7 |
| Weight and dimensions | | |
| Weight (kg) | 2.47 | 2.33 |
| Height (mm) | 28 | 28 |
| Depth (mm) | 256 | 256 |
| Width (mm) | 375 | 375 |
| Power | | |
| AC adapter power (W) | 90 | 90 |
| Security | | |
| Cable lock slot | - | + |