In depth comparison and review of Lenovo IdeaPad 520-15IKB (81BF) and Dell Latitude 7640. 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 IdeaPad 520-15IKB (81BF) based on its technical characteristics, features, user experience, expert reviews and price level.
robust metal design
crisp full HD display
backlit keyboard feature
adequate processing power
reasonable price point
average battery life
limited graphics performance
heavier than competitors
no USB-C port
Advantages and disadvantages of Dell Latitude 7640 based on its technical characteristics, features, user experience, expert reviews and price level.
robust security features
high-resolution display
powerful processor performance
lightweight design
excellent connectivity options
higher price point
average battery life
limited color options
noisy under load
| DESIGN AND DIMENSIONS | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 37.8 cm x 26 cm x 2.2 cm | 35.8 cm x 25.042 cm x 1.95 cm |
| Weight | 2.2 kg | 1.837 kg |
| Case Material | Metal | Aluminum |
| Colour | Golden | - |
| DISPLAY | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Screen Size (Type) | 15.6" - IPS | 16" - IPS |
|---|---|---|
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1200 (Full HD Plus) |
| Pixel Density (ppi) | - | 141.5 |
| V-Sync Rate at Max Res. | - | 60 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | - |
| Image Brightness | 250 cd/m² | 250 cd/m² |
| Colour Gamut | - | 45% NTSC |
| Features | Anti-glare | Anti-glare, 35 ms response rate, 85° horizontal and vertical viewing angle, 0.17952 mm pixel pitch |
| PROCESSOR | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| CPU | Intel Core i5 (8th Gen) 8550U / 1.8 GHz | Intel Core i5 (13th Gen) 1345U / 1.6 GHz |
|---|---|---|
| Max Turbo Speed | 4 GHz | 4.7 GHz |
| Number of Cores | Quad-Core | 10-core |
| Cache | 8 MB | L3 - 12 MB |
| Platform Technology | - | Intel vPro Enterprise |
| Features | Integrated memory controller | Intel Smart Cache |
| MEMORY | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| RAM | 8 GB (1 x 4 GB + 4 GB (soldered)) | 16 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 16 GB | - |
| RAM Type | DDR4 SDRAM | LPDDR5 SDRAM |
| Speed | 2133 MHz | 4800 MHz |
| Rated Speed | 2400 MHz | 4800 MHz |
| Form Factor | SO-DIMM 260-pin | - |
| Slots Qty | 1 | - |
| Empty Slots | 0 | - |
| STORAGE | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Main Storage Size (HDD/SSD) | 2 TB HDD SATA 6Gb/s / 5400 rpm | 512 GB SSD M.2 2230 PCIe 4.0 x4 - NVM Express (NVMe), Class 35 |
|---|---|---|
| Optical Drive | DVD±RW | - |
| AUDIO & VIDEO | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Multi-GPU Configuration | 1 single GPU card / integrated GPU | - |
|---|---|---|
| Graphics Processor (GPU) | NVIDIA GeForce MX150 / Intel UHD Graphics 620 | Intel Iris Xe Graphics |
| Video Memory | 4 GB GDDR5 SDRAM | - |
| Video System Features | - | Functions as Intel UHD graphics (for single-channel memory) |
| Camera | Yes - 720p | Yes - 1920 x 1080 (standard), 640 x 360 (infrared) |
| Resolution | 1 Megapixel | - |
| Camera Features | Fixed focus | Privacy shutter, IR/RGB camera, Temporal Noise Reduction, 80 degrees, 86.6 degrees (IR camera) |
| Image Sensor Type | - | CMOS |
| Video Resolutions | - | 1920 x 1080, 640 x 360 |
| Frame Rate | - | 30 frames per second |
| Sound | Stereo speakers, dual array microphone | Four stereo speakers, dual array microphone |
| Codec | - | Realtek ALC3281 |
| Compliant Standards | High Definition Audio, Dolby Audio | High Definition Audio |
| Audio Features | Output: Harman audio technology | - |
| COMMUNICATIONS | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.1 | Bluetooth, NFC, 802.11a/b/g/n/ac/ax (Wi-Fi 6E) |
|---|---|---|
| Wireless Controller | M.2 Card | Intel Wi-Fi 6E AX 211 |
| Network Interface | Gigabit Ethernet | - |
| Features | Single stream (1x1) | Dual stream (2x2), WWAN aerial |
| BATTERY | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Technology | 2-cell lithium polymer | 3-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 35 Wh | 57 Wh |
| Battery Life | Up to 6 hours | - |
| AC ADAPTER | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Input | AC 100-240 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt | 65 Watt, 5 / 9 / 15 / 20 V |
| INPUT | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Type | Keyboard, touchpad | Keyboard, ClickPad |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | Yes | Yes |
| Features | - | Mini LED backlit, 80-key |
| CONNECTIONS & EXPANSIONS | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Interfaces | USB-C 3.0 2 x USB 3.0 HDMI LAN Headphone/microphone combo jack |
HDMI 2 x USB4 (supports Thunderbolt 4, DisplayPort Alt Mode) (Power Delivery) USB 3.2 Gen 1 (PowerShare) USB 3.2 Gen 1 Headphone/microphone combo jack |
|---|---|---|
| Memory Card Reader | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card) | - |
| SOFTWARE | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Operating System (OS) | Windows 10 Home 64-bit Edition - English | Windows 11 Pro - Dutch / English / French / German / Italian |
|---|---|---|
| Software Included | - | Microsoft Office (30 days trial, excludes office licence) |
| MISCELLANEOUS | Lenovo IdeaPad 520-15IKB (81BF) | Dell Latitude 7640 |
|---|
| Included Accessories | Power adapter | USB-C power adapter |
|---|---|---|
| Integrated Options | - | Accelerometer, hall sensor |
| Security | Fingerprint reader | Discrete Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader, smart card reader, contactless smart card reader |
| Security Slot Type | Kensington mini 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 | ExpressCharge, ExpressChargeBoost |
| Compliant Standards | RoHS | FIPS 140-2, TCG Certified, TCO Certified 9.0 |
| Max Operating Temperature | - | 35 °C |
| Min Operating Temperature | - | 0 °C |
| Humidity Range Operating | - | 10 - 90% (non-condensing) |
| Manufacturer Warranty | Limited warranty - 1 year - pick-up and return | - |
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