Side by side comparison and review of Dell Precision 7720 and Dell Precision 3551. Compare dimensions, processors, batteries, storage capacities and other key specifications and features to simplify the choice of your perfect laptop. Our goal is to make it easier for you to decide on the laptop that will best meet your expectations by revealing the main differences between the products.
Advantages and disadvantages of Dell Precision 3551 based on its technical characteristics, features, user experience, expert reviews and price level.
robust processing power
expandable memory options
reliable build quality
adequate port selection
decent battery life
heavier design
basic display quality
noisy under load
premium price tag
| DESIGN AND DIMENSIONS | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Product Type | Mobile workstation | Mobile workstation |
|---|---|---|
| Dimensions (WxDxH) | 41.67 cm x 28.12 cm x 3.53 cm | 35.91 cm x 23.625 cm x 1.499 cm |
| Weight | 3.4 kg | 1.89 kg |
| Colour | Black | - |
| DISPLAY | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Screen Size (Type) | 17.3" - 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 Brightness | 300 cd/m² | - |
| Features | UltraSharp, anti-glare, Corning Gorilla glass 4 | Anti-glare, Wide Viewing Angle, ±80° horizontal viewing angle, ±80° vertical viewing angle |
| PROCESSOR | Dell Precision 7720 | Dell Precision 3551 |
|---|
| CPU | Intel Core i7 (7th Gen) 7700HQ / 2.8 GHz | Intel Core i7 (10th Gen) 10750H / 2.6 GHz |
|---|---|---|
| Max Turbo Speed | 3.8 GHz | 5 GHz |
| Number of Cores | Quad-Core | 6-core |
| Cache | 6 MB | 12 MB |
| 64-bit Computing | Yes | Yes |
| Chipset | Mobile Intel CM238 | - |
| Features | Intel Turbo Boost Technology 2.0 | Intel Turbo Boost Max Technology 3.0 |
| MEMORY | Dell Precision 7720 | Dell Precision 3551 |
|---|
| RAM | 16 GB (2 x 8 GB) | 8 GB (1 x 8 GB) |
|---|---|---|
| Max RAM Supported | 64 GB | 64 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2400 MHz | 2933 MHz |
| Rated Speed | 2400 MHz | 2933 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 4 | 2 |
| Empty Slots | 2 | 1 |
| STORAGE | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 PCIe - NVM Express (NVMe) | 256 GB SSD M.2 PCIe |
|---|
| AUDIO & VIDEO | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Graphics Processor (GPU) | NVIDIA Quadro M1200 | NVIDIA Quadro P620 |
|---|---|---|
| Video Memory | 4 GB GDDR5 SDRAM | 4 GB GDDR5 SDRAM |
| Camera | Yes - 1280 x 720 | Yes - HD |
| Resolution | - | 8 Megapixel |
| Camera Features | 720p HD movie recording | 78.6 degrees |
| Image Sensor Type | CMOS | CMOS |
| Video Resolutions | 1280 x 720 | 1280 x 720 |
| Frame Rate | - | 30 frames per second |
| Sound | Stereo speakers, microphone | Stereo speakers, dual array microphone |
| Codec | - | Realtek ALC3204 |
| Compliant Standards | High Definition Audio | High Definition Audio, Wave MAXXAudio Pro |
| COMMUNICATIONS | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.2 | 802.11a/b/g/n/ac Wave 2/ax, Bluetooth 5.1 |
|---|---|---|
| Wireless Controller | Intel Dual Band Wireless-AC 8265 | Intel Wi-Fi 6 AX 201 |
| Network Interface | Gigabit Ethernet | Gigabit Ethernet |
| BATTERY | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Technology | 6-cell Lithium Ion | 4-cell |
|---|---|---|
| Battery Capacity (Size) | - | 68 Wh |
| AC ADAPTER | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 240 Watt, 19.5 V, 12.31 A | 130 Watt, 20 V, 6.5 A |
| INPUT | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Type | Keyboard, touchpad | Keyboard, touchpad, pointing stick |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | Yes | Yes |
| Features | Multi-gesture touch pad | - |
| CONNECTIONS & EXPANSIONS | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Interfaces | Mini DisplayPort LAN 4 x USB 3.1 Gen 1 (PowerShare) Headphone/microphone combo jack HDMI Dock USB-C (supports Thunderbolt) |
HDMI USB-C 3.1 Gen 2 (supports Thunderbolt 3, DisplayPort 1.4 Alt Mode) USB 3.1 (PowerShare) 2 x USB 3.1 Gen 1 LAN Headphone/microphone combo jack |
|---|---|---|
| Memory Card Reader | Yes (SD Card) | Yes (microSD, microSDHC, microSDXC) |
| SOFTWARE | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Operating System (OS) | Windows 10 Pro 64-bit Edition - Multilingual User Interface (MUI) | Windows 10 Pro 64-bit Edition - Multilingual User Interface (MUI) |
|---|---|---|
| Software Included | Microsoft Office (Trial), McAfee (30 days trial) | Microsoft Office (Trial) |
| MISCELLANEOUS | Dell Precision 7720 | Dell Precision 3551 |
|---|
| Dockable | Yes | - |
|---|---|---|
| Included Accessories | Power adapter | Power adapter |
| Security | Smart card reader | Trusted Platform Module (TPM 2.0) Security Chip, smart card reader |
| Security Slot Type | - | Noble Wedge security slot |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | Security lock slot (cable lock sold separately) |
| Max Operating Temperature | 40 °C | 35 °C |
| Min Operating Temperature | 0 °C | 0 °C |
| Humidity Range Operating | 10 - 90% (non-condensing) | 0 - 95% (non-condensing) |
| Manufacturer Warranty | Limited warranty - 3 years - response time: next business day | - |
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