In depth comparison and review of Lenovo ThinkPad P51 (20HJ) and Dell Precision 5540. 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 Dell Precision 5540 based on its technical characteristics, features, user experience, expert reviews and price level.
powerful processor performance
lightweight and portable
excellent 4k display
robust build quality
good thermal management
expensive price point
limited port selection
average battery life
noisy under load
| DESIGN AND DIMENSIONS | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Product Type | Mobile workstation | Mobile workstation |
|---|---|---|
| Dimensions (WxDxH) | 37.74 cm x 25.23 cm x 2.94 cm | 35.7 cm x 23.5 cm x 1.12 cm |
| Weight | 2.55 kg | 1.8 kg |
| Case Material | Glass-fibre reinforced plastic, magnesium-aluminum alloy | - |
| Colour | Black | Silver |
| DISPLAY | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Screen Size (Type) | 15.6" - IPS | 15.6" |
|---|---|---|
| LCD Backlight Technology | LED backlight | - |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Pixel Density (ppi) | - | 141 |
| V-Sync Rate at Max Res. | - | 60 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 250 cd/m² | - |
| Colour Gamut | - | 100% sRGB |
| Features | Anti-glare | UltraSharp, anti-glare, IGZO technology, ±89° horizontal viewing angle, ±89° vertical viewing angle, 0.18 mm pixel pitch |
| PROCESSOR | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| CPU | Intel Core i7 (7th Gen) 7820HQ / 2.9 GHz | Intel Core i7 (9th Gen) 9850H / 2.6 GHz |
|---|---|---|
| Max Turbo Speed | 3.9 GHz | 4.6 GHz |
| Number of Cores | Quad-Core | 6-core |
| Cache | 8 MB | 12 MB |
| 64-bit Computing | Yes | Yes |
| Chipset | Mobile Intel CM238 | - |
| Platform Technology | - | Intel vPro Platform |
| Features | Integrated memory controller | Intel Turbo Boost Technology 2.0 |
| MEMORY | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| RAM | 8 GB (1 x 8 GB) | 8 GB (1 x 8 GB) |
|---|---|---|
| Max RAM Supported | 64 GB | 64 GB |
| RAM Type | DDR4 SDRAM - non-ECC | DDR4 SDRAM - non-ECC |
| Speed | 2400 MHz | 2666 MHz |
| Rated Speed | 2400 MHz | 2666 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 4 | 2 |
| Empty Slots | 3 | 1 |
| STORAGE | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Main Storage Size (HDD/SSD) | 500 GB HDD SATA 6Gb/s / 7200 rpm | 256 GB SSD M.2 PCIe - NVM Express (NVMe), Class 40 |
|---|
| AUDIO & VIDEO | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Multi-GPU Configuration | 1 single GPU card / integrated GPU | - |
|---|---|---|
| Graphics Processor (GPU) | NVIDIA Quadro M1200 / Intel HD Graphics 630 | NVIDIA Quadro T1000 |
| Video Memory | 4 GB | 4 GB GDDR5 SDRAM |
| Camera | Yes - 720p | Yes - HD |
| Resolution | - | 0.92 Megapixel |
| Camera Features | - | 66 degrees |
| Video Resolutions | - | 1280 x 720 |
| Frame Rate | - | 30 frames per second |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
| Codec | Realtek ALC3268 | - |
| Compliant Standards | High Definition Audio | - |
| Audio Features | - | Output: MaxxAudio Pro |
| COMMUNICATIONS | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.1 | 802.11a/b/g/n/ac Wave 2, Bluetooth 5.0 |
|---|---|---|
| Wireless Controller | Intel Dual Band Wireless-AC 8265 - M.2 Card | Intel Wireless-AC 9260 |
| Network Interface | Gigabit Ethernet | Ethernet |
| Features | - | Wake-on-LAN (WOL) |
| BATTERY | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Technology | 4-cell Lithium Ion | 3-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 66 Wh | 56 Wh |
| Battery Life | Up to 6.5 hours | - |
| AC ADAPTER | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 170 Watt, 20 V | 130 Watt, 19.5 V, 6.67 A |
| INPUT | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | - | Yes |
| Features | Spill-resistant, multi-touch touchpad | Multi-touch touchpad |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| 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 |
Headphone/microphone combo jack 2 x USB 3.1 Gen 1 (PowerShare) USB-C 3.1 Gen 2 (supports Thunderbolt 3) (Power Delivery) LAN (on supplied adapter) HDMI |
| Memory Card Reader | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card, SDXC UHS-II Card) | Yes (SD Card) |
| SOFTWARE | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Operating System (OS) | Windows 10 Pro 64-bit Edition | Windows 10 Pro 64-bit Edition - Multilingual User Interface (MUI) |
|---|---|---|
| Software Included | - | Microsoft Office (Trial) |
| MISCELLANEOUS | Lenovo ThinkPad P51 (20HJ) | Dell Precision 5540 |
|---|
| Dockable | Yes | - |
|---|---|---|
| Included Accessories | Power adapter | Power adapter, USB to Ethernet 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 | Noble Wedge 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 | - |
| Compliant Standards | RoHS | - |
| ENERGY STAR Certified | Yes | - |
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