| Attribute |
ASUS ASUSPRO PU551LD-CN042G (90NB05J1-M00690) × | 
ASUS X550LN-XO028H (X550LN-XO028H) × |
| General | | |
| Model | ASUS ASUSPRO PU551LD-CN042G | ASUS X550LN-XO028H |
| Product code | 90NB05J1-M00690 | X550LN-XO028H |
| Design | | |
| Form factor | Clamshell | Clamshell |
| Brand | ASUS | ASUS |
| Family | ASUSPRO | - |
| Series | PU | - |
| Model name | PU551LD-CN042G | X550LN-XO028H |
| Part number | 90NB05J1-M00690 | X550LN-XO028H |
| Market positioning | Business | - |
| Release year (year) | 2018 | 2017 |
| Processor | | |
| Processor family | 4th gen Intel Core i5 | 4th gen Intel Core i5 |
| Processor frequency (GHz) | 1.7 | 1.7 |
| Processor boost frequency (GHz) | 2.7 | 2.7 |
| Processor model | i5-4210U | i5-4210U |
| Processor cores | 2 | 2 |
| Processor threads | 4 | 4 |
| Processor lithography (Nm) | 22 | 22 |
| Processor socket | BGA 1168 | BGA 1168 |
| Processor cache (MB) | 3 | 3 |
| Memory | | |
| Internal memory type | DDR3L-SDRAM | DDR3L-SDRAM |
| Maximum internal memory (GB) | 16 | 8 |
| Memory clock speed (MHz) | 1,600 | 1,600 |
| Internal memory (GB) | 8 | 8 |
| Display | | |
| Display diagonal (inch) | 15.6 | 15.6 |
| HD type | Full HD | HD |
| LED backlight | + | + |
| Touchscreen | - | - |
| Display resolution | 1920 x 1080 pixels | 1366 x 768 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | NVIDIA GeForce 820M | NVIDIA GeForce GT 840M |
| Discrete graphics memory type | GDDR3 | GDDR3 |
| Discrete graphics adapter | + | + |
| On-board graphics adapter base frequency (MHz) | 200 | 200 |
| Maximum on-board graphics adapter memory (GB) | 74 | 74 |
| On-board graphics adapter model | Intel HD Graphics 4400 | Intel HD Graphics 4400 |
| Storage | | |
| Total storage capacity (GB) | 750 | 750 |
| Card reader integrated | + | + |
| Storage media | HDD | HDD |
| Optical drive | + | - |
| Networking | | |
| Wi-Fi standards | - ieee 802.11b
- ieee 802.11g
- ieee 802.11n
| - ieee 802.11b
- ieee 802.11g
- ieee 802.11n
|
| Bluetooth | + | - |
| Ethernet LAN | + | + |
| Ethernet LAN data rates (Mbit/s) | | |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 4.0 | - |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 2 | 2 |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | 2 | 1 |
| HDMI ports quantity | 1 | 1 |
| Ethernet LAN (RJ-45) ports | 1 | 1 |
| Audio | | |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Keyboard | | |
| Numeric keypad | + | + |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 8.1 Pro | Windows 8.1 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | - | 37 |
| Weight and dimensions | | |
| Weight (kg) | - | 2.3 |
| Height (mm) | 28.2 | - |
| Depth (mm) | 256 | 251 |
| Width (mm) | 380 | 380 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Cable lock slot | + | + |
| Fingerprint reader | + | - |