Side by side comparison and review of Lenovo ThinkPad X390 and Lenovo IdeaPad S540-15IML (81NG). 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 Lenovo ThinkPad X390 based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
excellent keyboard comfort
impressive battery life
compact and portable
reliable performance
average display brightness
limited graphics capability
noisy under load
higher price point
Advantages and disadvantages of Lenovo IdeaPad S540-15IML (81NG) based on its technical characteristics, features, user experience, expert reviews and price level.
sleek aluminum design
sharp full HD display
fast processing speeds
ample storage capacity
good battery life
heavier than competitors
no optical drive
limited port selection
average graphics performance
| DESIGN AND DIMENSIONS | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 31.2 cm x 21.72 cm x 1.69 cm | 35.8 cm x 24.5 cm x 1.69 cm |
| Weight | 1.33 kg | 1.95 kg |
| Case Material | - | Aluminum, glass |
| Colour | - | Mineral grey |
| DISPLAY | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Screen Size (Type) | 13.3" - TN | 15.6" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1366 x 768 (HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 250 cd/m² | 300 cd/m² |
| Colour Gamut | 45% | 72% |
| Features | Anti-glare, 90° viewing angle | Glossy, glass cover |
| PROCESSOR | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| CPU | Intel Core i5 (8th Gen) 8365U / 1.6 GHz | Intel Core i5 (10th Gen) 10210U / 1.6 GHz |
|---|---|---|
| Max Turbo Speed | 4.1 GHz | 4.2 GHz |
| Number of Cores | Quad-Core | Quad-Core |
| Cache | 6 MB | 6 MB |
| 64-bit Computing | Yes | Yes |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| RAM | 8 GB | 8 GB (1 x 4 GB + 4 GB (soldered)) |
|---|---|---|
| Max RAM Supported | - | 12 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | - | 2400 MHz |
| Rated Speed | - | 2400 MHz |
| Form Factor | - | SO-DIMM 260-pin |
| Slots Qty | - | 1 |
| Empty Slots | - | 0 |
| STORAGE | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD | 512 GB SSD M.2 2280 PCIe 3.0 x4 - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics 620 | Intel UHD Graphics |
|---|---|---|
| Camera | Yes - 720p | Yes - 720p |
| Resolution | - | 1 Megapixel |
| Camera Features | - | Privacy shutter |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
| Codec | Realtek ALC3287 | - |
| Compliant Standards | High Definition Audio, Dolby Audio Premium | High Definition Audio, Dolby Audio |
| COMMUNICATIONS | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 5.0 | 802.11a/b/g/n/ac, Bluetooth 4.2 |
|---|---|---|
| Wireless Controller | Intel Wireless-AC 9560 | M.2 Card |
| Network Interface | Gigabit Ethernet | - |
| Features | - | Dual stream (2x2) |
| BATTERY | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Technology | Lithium Ion | Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | - | 70 Wh |
| Battery Life | - | Up to 15 hours |
| AC ADAPTER | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | - | 65 Watt |
| INPUT | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | - | Yes |
| Keyboard Backlight | - | Yes |
| Features | Spill-resistant, multi-touch touchpad, buttonless touchpad | Multi-touch touchpad, buttonless touchpad |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Interfaces | 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 Lenovo Ethernet extension connector Dock Headphone/microphone combo jack LAN (on supplied cable) |
USB 3.1 Gen 1 USB 3.1 Gen 1 (Always On) USB-C 3.1 Gen 1 HDMI Headphone/microphone combo jack |
|---|---|---|
| Memory Card Reader | Yes (microSD) | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card) |
| SOFTWARE | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Operating System (OS) | Windows 10 Pro (Microsoft Authorized Refurbisher (MAR)) | Windows 10 Home 64-bit Edition - English |
|---|---|---|
| Software Included | - | Microsoft Office (30 days trial) |
| MISCELLANEOUS | Lenovo ThinkPad X390 | Lenovo IdeaPad S540-15IML (81NG) |
|---|
| Dockable | Yes | - |
|---|---|---|
| Included Accessories | - | Power adapter |
| Security | - | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader |
| Security Slot Type | Kensington security slot | - |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | - |
| Features | - | Administrator password, hard drive password, power-on password, RapidCharge |
| Compliant Standards | ISO 9001, ISO 14001, ISO 27001 | RoHS, Energy-Related Products (ErP) Lot 3 |
| SAR Value | - | 1.81 W/kg (body), 1.81 W/kg (limb) |
| ENERGY STAR Certified | Yes | - |
| Manufacturer Warranty | - | Limited warranty - 1 year - pick-up and return |
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