| Attribute |
Lenovo ThinkPad X220 (429037U) × | 
HP ProBook ProBook 4520s Notebook PC (WD842EA) × |
| General | | |
| Model | Lenovo ThinkPad X220 | HP ProBook ProBook 4520s Notebook PC |
| Product code | 429037U | WD842EA |
| Design | | |
| Product colour | Black | Black |
| Brand | Lenovo | HP |
| Family | ThinkPad | ProBook |
| Series | X | 4000 |
| Model name | X220 | ProBook 4520s Notebook PC |
| Part number | 429037U | WD842EA |
| Release year (year) | 2011 | 2010 |
| Processor | | |
| Processor family | 2nd gen Intel Core i5 | 3rd gen Intel Core i3 |
| Processor frequency (GHz) | 2.6 | 2.3 |
| Processor boost frequency (GHz) | 3.3 | - |
| Processor model | i5-2540M | i3-350M |
| Processor cores | 2 | 2 |
| Processor threads | 4 | 4 |
| Processor lithography (Nm) | 32 | 32 |
| Processor socket | BGA 1023 | BGA 1288 |
| Processor cache (MB) | 3 | 3 |
| Memory | | |
| Internal memory type | DDR3-SDRAM | - |
| Maximum internal memory (GB) | 8 | 8 |
| Memory clock speed (MHz) | 1,333 | 1,333 |
| Internal memory (GB) | 4 | 3 |
| Display | | |
| Display diagonal (inch) | 12.5 | 15.6 |
| LED backlight | + | + |
| Display resolution | 1366 x 768 pixels | 1366 x 768 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | - | Intel HD Graphics |
| Discrete graphics adapter | - | + |
| On-board graphics adapter base frequency (MHz) | 650 | 500 |
| On-board graphics adapter model | Intel HD Graphics 3000 | Intel HD Graphics |
| Storage | | |
| Total storage capacity (GB) | 320 | 320 |
| Card reader integrated | + | + |
| Storage media | HDD | HDD |
| Optical drive | - | + |
| Networking | | |
| Bluetooth | + | + |
| Ethernet LAN | + | - |
| Wi-Fi | + | + |
| 3g | - | - |
| Bluetooth version | 2.1+EDR | 2.1+EDR |
| Ports and interfaces | | |
| USB 2.0 ports | 3 | 3 |
| Docking connector | - | - |
| DVI port | - | - |
| HDMI ports quantity | - | 1 |
| Ethernet LAN (RJ-45) ports | 1 | 1 |
| Audio | | |
| Speaker power (W) | 2 | - |
| Keyboard | | |
| Numeric keypad | - | - |
| Full-size keyboard | - | - |
| Pointing device | ThinkPad UltraNav | - |
| Software | | |
| Operating system installed | Windows 7 Professional | Windows 7 Professional |
| Operating system architecture (bit) | 64 | - |
| Battery | | |
| Battery life (max) (h) | 15 | - |
| Weight and dimensions | | |
| Weight (kg) | 1.3 | 2.39 |
| Depth (mm) | 206.5 | 249.6 |
| Width (mm) | 305 | 371.8 |
| Security | | |
| Cable lock slot | + | + |
| Fingerprint reader | + | - |
| Trusted platform module (TPM) | + | - |