In depth comparison and review of Lenovo ThinkPad P51 (20HJ) and Lenovo ThinkPad P43s (20RJ). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
Advantages and disadvantages of Lenovo ThinkPad P43s (20RJ) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
excellent keyboard comfort
good battery life
impressive security features
portable design
mediocre display brightness
limited graphics performance
no thunderbolt support
higher price point
| DESIGN AND DIMENSIONS | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Product Type | Mobile workstation | Mobile workstation |
|---|---|---|
| Dimensions (WxDxH) | 37.74 cm x 25.23 cm x 2.94 cm | 32.9 cm x 22.7 cm x 1.79 cm |
| Weight | 2.55 kg | 1.55 kg |
| Case Material | Glass-fibre reinforced plastic, magnesium-aluminum alloy | Glass-fibre, polyphenylene sulfide, polyamide |
| Colour | Black | Black |
| DISPLAY | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Screen Size (Type) | 15.6" - IPS | 14" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 250 cd/m² | 250 cd/m² |
| Colour Gamut | - | 45% |
| Features | Anti-glare | Anti-glare, 170° viewing angle |
| PROCESSOR | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| CPU | Intel Core i7 (7th Gen) 7820HQ / 2.9 GHz | Intel Core i7 (8th Gen) 8565U / 1.8 GHz |
|---|---|---|
| Max Turbo Speed | 3.9 GHz | 4.6 GHz |
| Number of Cores | Quad-Core | Quad-Core |
| Cache | 8 MB | 8 MB |
| 64-bit Computing | Yes | Yes |
| Chipset | Mobile Intel CM238 | - |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| RAM | 8 GB (1 x 8 GB) | 8 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 64 GB | 40 GB |
| RAM Type | DDR4 SDRAM - non-ECC | DDR4 SDRAM |
| Speed | 2400 MHz | 2400 MHz |
| Rated Speed | 2400 MHz | 2666 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 4 | 1 |
| Empty Slots | 3 | 1 |
| STORAGE | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Main Storage Size (HDD/SSD) | 500 GB HDD SATA 6Gb/s / 7200 rpm | 256 GB SSD M.2 2280 PCIe 3.0 x4 - TCG Opal Encryption - Samsung |
|---|
| AUDIO & VIDEO | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Multi-GPU Configuration | 1 single GPU card / integrated GPU | 1 single GPU card / integrated GPU |
|---|---|---|
| Graphics Processor (GPU) | NVIDIA Quadro M1200 / Intel HD Graphics 630 | NVIDIA Quadro P520 / Intel UHD Graphics 620 |
| Video Memory | 4 GB | 2 GB GDDR5 SDRAM |
| Camera | Yes - 720p | Yes - 720p |
| Camera Features | - | ThinkShutter camera privacy |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
| Codec | Realtek ALC3268 | Realtek ALC3287 |
| Compliant Standards | High Definition Audio | High Definition Audio, Dolby Audio Premium |
| COMMUNICATIONS | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.1 | 802.11a/b/g/n/ac, Bluetooth 5.0 |
|---|---|---|
| Wireless Controller | Intel Dual Band Wireless-AC 8265 - M.2 Card | Intel Wireless-AC 9560 |
| Network Interface | Gigabit Ethernet | Gigabit Ethernet |
| BATTERY | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Technology | 4-cell Lithium Ion | 3-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 66 Wh | 50 Wh |
| Battery Life | Up to 6.5 hours | Up to 14.7 hours |
| AC ADAPTER | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 170 Watt, 20 V | 65 Watt |
| INPUT | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Type | Keyboard, TrackPoint, UltraNav | Keyboard, TrackPoint, UltraNav |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | - | Yes |
| Features | Spill-resistant, multi-touch touchpad | Spill-resistant, multi-touch touchpad, buttonless touchpad |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Slots | 1 x ExpressCard/34 (1 free) | - |
|---|---|---|
| Interfaces | USB 3.1 Gen 1/USB 3.0 (Always On) 3 x USB 3.1 Gen 1/USB 3.0 USB-C (supports Thunderbolt 3) Mini DisplayPort HDMI LAN Dock Headphone/microphone combo jack |
USB 3.1 Gen 1 USB 3.1 Gen 1 (Always On) USB-C 3.1 Gen 1 (supports DisplayPort Alt Mode) (Power Delivery) USB-C 3.1 Gen 2 (supports Thunderbolt 3, DisplayPort Alt Mode) (Power Delivery) HDMI LAN Dock Headphone/microphone combo jack |
| Memory Card Reader | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card, SDXC UHS-II Card) | Yes (microSD) |
| SOFTWARE | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Operating System (OS) | Windows 10 Pro 64-bit Edition | Windows 10 Home 64-bit Edition |
|---|
| MISCELLANEOUS | Lenovo ThinkPad P51 (20HJ) | Lenovo ThinkPad P43s (20RJ) |
|---|
| Dockable | Yes | Yes |
|---|---|---|
| Included Accessories | Power adapter | USB-C power adapter |
| Security | Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader | Trusted Platform Module (TPM 2.0) Security Chip |
| Security Slot Type | Kensington security slot | Kensington security slot |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | Security lock slot (cable lock sold separately) |
| Features | Administrator password, hard drive password, power-on password, ThinkVantage Active Protection System, MIL-STD-810G tested | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810G tested |
| Compliant Standards | RoHS | RoHS |
| ENERGY STAR Certified | Yes | Yes |
| EPEAT Compliant | - | EPEAT Silver |
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