In depth comparison and review of Lenovo ThinkPad E15 Gen 4 (21ED) and Dell Vostro 3520. 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 E15 Gen 4 (21ED) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
efficient performance
comfortable keyboard
good security features
affordable price
average display quality
limited graphics power
moderate battery life
noisy under load
Advantages and disadvantages of Dell Vostro 3520 based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
robust build quality
decent processor performance
good battery life
comfortable keyboard
average display quality
limited graphics capability
heavier design
fewer USB-C ports
| DESIGN AND DIMENSIONS | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.5 cm x 24 cm x 1.89 cm | 35.85 cm x 23.556 cm x 1.899 cm |
| Weight | 1.78 kg | 1.83 kg |
| Case Material | Aluminium (top), polycarbonate ABS (bottom) | - |
| Colour | Black | Carbon black |
| DISPLAY | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Screen Size (Type) | 15.6" - IPS | 15.6" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | - |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Pixel Density (ppi) | - | 140 |
| V-Sync Rate at Max Res. | - | 120 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | - |
| Image Brightness | 300 cd/m² | 250 cd/m² |
| Colour Gamut | - | 45% NTSC |
| Features | Anti-glare, 170° viewing angle | Anti-glare, Wide Viewing Angle, ±80° horizontal viewing angle, ±80° vertical viewing angle, Narrow Border Display, 35 ms response rate, 0.17925 mm pixel pitch |
| PROCESSOR | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| CPU | AMD Ryzen 5 5625U / 2.3 GHz | Intel Core i5 (11th Gen) 1135G7 / 2.4 GHz |
|---|---|---|
| Max Turbo Speed | 4.3 GHz | 4.2 GHz |
| Number of Cores | 6-core | Quad-Core |
| Cache | L3 - 16 MB | 8 MB |
| Features | Integrated memory controller | Intel Smart Cache |
| MEMORY | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| RAM | 8 GB (provided memory is soldered) | 8 GB (1 x 8 GB) |
|---|---|---|
| Max RAM Supported | 40 GB | 16 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 3200 MHz | 3200 MHz |
| Rated Speed | 3200 MHz | 3200 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 1 | 2 |
| Empty Slots | 1 | 1 |
| STORAGE | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 2242 PCIe 4.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe) | 256 GB SSD M.2 PCIe - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Graphics Processor (GPU) | AMD Radeon Graphics | Intel Iris Xe Graphics |
|---|---|---|
| Max Monitors Supported | 2 external monitor(s) | - |
| Video System Features | - | Functions as Intel UHD graphics (for single-channel memory) |
| Camera | Yes - 1080p | Yes - HD |
| Resolution | - | 0.92 Megapixel |
| Camera Features | Privacy shutter, IR camera, Windows Hello, fixed focus | 78.6 degrees |
| Image Sensor Type | - | CMOS |
| Video Resolutions | - | 1280 x 720 |
| Frame Rate | - | 30 frames per second |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, microphone |
| Codec | Realtek ALC3287 | - |
| Compliant Standards | High Definition Audio, Dolby Audio | High Definition Audio |
| Audio Features | Harman-branded | - |
| COMMUNICATIONS | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Wireless | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 | Bluetooth, 802.11a/b/g/n/ac |
|---|---|---|
| Wireless Controller | M.2 Card | M.2 2230 |
| Network Interface | Gigabit Ethernet | Gigabit Ethernet |
| Ethernet Controller | Realtek RTL8111H-CG | Realtek RTL8111H |
| Features | Wake-on-LAN (WOL), dual stream (2x2) | Single stream (1x1) |
| BATTERY | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Technology | Lithium polymer | 3-cell lithium polymer |
|---|---|---|
| Battery Capacity (Size) | 57 Wh | 41 Wh |
| Battery Life | Up to 16.5 hours | - |
| AC ADAPTER | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Input | AC 100-240 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt | 65 Watt, 19.5 V, 3.34 A |
| INPUT | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | Yes | Yes |
| Keyboard Backlight | Yes | - |
| Features | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls | - |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Slots | 2 x M.2 Card (1 free) | - |
|---|---|---|
| Interfaces | USB 2.0 USB 3.2 Gen 1 (Always On) USB-C 3.2 Gen 1 (supports DisplayPort 1.2 Alt Mode) (Power Delivery 3.0) HDMI LAN Headphone/microphone combo jack |
HDMI 2 x USB 3.2 Gen 1 USB 2.0 LAN Headphone/microphone combo jack |
| Memory Card Reader | - | Yes (SD Card, SDHC Card, SDXC Card) |
| SOFTWARE | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Operating System (OS) | Windows 11 Pro - English | Windows 11 Pro - Dutch / English / French / German / Italian |
|---|---|---|
| Software Included | - | Microsoft Office (30 days trial, excludes office licence), McAfee Business Protection (1-year) |
| MISCELLANEOUS | Lenovo ThinkPad E15 Gen 4 (21ED) | Dell Vostro 3520 |
|---|
| Included Accessories | USB-C power adapter | Power adapter |
|---|---|---|
| Security | Discrete 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, power-on password, MIL-STD-810H tested, self-healing BIOS, NVMe password | - |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3, TCG Certified, TUV Rheinland Low Blue Light (Software Solution) | - |
| ENERGY STAR Certified | Yes | - |
| EPEAT Compliant | EPEAT Gold | - |
| Max Operating Temperature | 35 °C | 35 °C |
| Min Operating Temperature | 5 °C | 0 °C |
| Humidity Range Operating | 8 - 95% | 10 - 90% (non-condensing) |
| Manufacturer Warranty | Base warranty - 1 year - pick-up and return Extended warranty - 1 year - on-site |
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