ASUS Chromebook 14 (CX1405) vs Lenovo IdeaPad Flex 3 Chromebook
Both are good choices with different strengths. The ASUS Chromebook 14 gets updates for longer, is lighter and is more compact, while the Lenovo IdeaPad Flex 3 Chromebook has more memory, has more storage and has a bigger screen.
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Key differences
- Updates ASUS Chromebook 14 wins
The ASUS Chromebook 14 gets Chromebook updates until June 2035, about 4 years longer than the Lenovo IdeaPad Flex 3 Chromebook (June 2031).
- Memory Lenovo IdeaPad Flex 3 Chromebook wins
The Lenovo IdeaPad Flex 3 Chromebook has 8 GB of memory against 4 GB, so it has more room for big projects and heavy multitasking.
- Storage Lenovo IdeaPad Flex 3 Chromebook wins
The Lenovo IdeaPad Flex 3 Chromebook has twice the storage: 128 GB against 64 GB.
- Weight ASUS Chromebook 14 wins
The ASUS Chromebook 14 is 0.5 kg lighter: 1.39 kg against 1.9 kg.
- Screen size Depends on you
The Lenovo IdeaPad Flex 3 Chromebook has the bigger screen (15.6" against 14"), while the ASUS Chromebook 14 is more compact.
Which one should you choose?
Choose the ASUS Chromebook 14 if…
- You'll keep it for years: Google updates it until June 2035.
- You'll carry it every day: at 1.39 kg it's easy to take everywhere.
- You want something compact for small bags and train tables: it has a 14-inch screen.
Choose the Lenovo IdeaPad Flex 3 Chromebook if…
- You keep lots of tabs and apps open: 8 GB of memory gives it more room than 4 GB.
- You store lots of photos, videos or games: it has 128 GB of storage.
- You want more room to work: its 15.6-inch screen fits two windows side by side.
Full spec comparison
Add more laptopsThe ASUS Chromebook 14 leads on software and updates and battery and weight, while the Lenovo IdeaPad Flex 3 Chromebook leads on performance and the screen. Highlighted values mark the better spec in each row, and you can hide the rows where they match.
Performance
The Lenovo IdeaPad Flex 3 Chromebook is ahead on performance.
It has more memory and has more storage, and the ASUS Chromebook 14 doesn't beat it on anything here.
| Spec | ASUS Chromebook 14 (CX1405) | Lenovo IdeaPad Flex 3 Chromebook |
|---|---|---|
| Processor | Celeron N50 | Intel Pentium Silver N6000 |
| Graphics | Intel Graphics | Intel UHD Graphics |
| Memory (RAM) | 4 GB | 8 GB |
| Memory type | LPDDR4X | LPDDR4x-2933 |
| Maximum memory | 4 GB | 8 GB |
| Memory upgrades | Soldered (not upgradeable) | Soldered (not upgradeable) |
| Storage | 64 GB | 128 GB |
| Storage type | eMMC | eMMC |
| Storage interface | eMMC | eMMC 5.1 |
| Storage slots | — | 0 |
Screen
The Lenovo IdeaPad Flex 3 Chromebook is ahead on the screen.
The Lenovo IdeaPad Flex 3 Chromebook has the bigger screen (15.6" against 14"), while the ASUS Chromebook 14 is more compact. The ASUS Chromebook 14 is more compact, while the Lenovo IdeaPad Flex 3 Chromebook has a bigger screen, has a touchscreen and has a brighter screen.
| Spec | ASUS Chromebook 14 (CX1405) | Lenovo IdeaPad Flex 3 Chromebook |
|---|---|---|
| Screen size | 14" | 15.6" |
| Resolution | Full HD (1920 x 1080) | Full HD (1920 x 1080) |
| Aspect ratio | 16:9 | 16:9 |
| Panel | TN | IPS |
| Refresh rate | 60 Hz | 60 Hz |
| Variable refresh (VRR) | No | — |
| Brightness | 250 nits | 300 nits |
| Colour range | 45% NTSC | 45% NTSC |
| HDR | None | None |
| Finish | Matte | Glossy |
| Touchscreen | No | Yes |
Battery and size
Each laptop has its strengths on battery and weight.
The ASUS Chromebook 14 is lighter, while the Lenovo IdeaPad Flex 3 Chromebook has a bigger battery.
| Spec | ASUS Chromebook 14 (CX1405) | Lenovo IdeaPad Flex 3 Chromebook |
|---|---|---|
| Battery life (maker claim) | — | Up to 10 hours |
| Battery capacity | 42 Wh | 47 Wh |
| Charger | 45 W | 45 W |
| Charges via | USB-C | USB-C |
| Weight | 1.39 kg | 1.9 kg |
| Dimensions | 324.5 x 214.4 x 17.0-19.9 mm | 362 x 248 x 18.94 mm |
| Materials | 30% post-consumer recycled plastic in cover or inner frame | PC + ABS (top), PC + ABS (bottom) |
| Durability | MIL-STD-810H | — |
| Hinge | 180-degree lay-flat | 360-degree convertible |
| Colour | Fabric Blue | Arctic Grey |
| Colours available | Quiet Blue, Pure Grey, Fabric Blue | Abyss Blue, Arctic Grey |
Ports and wireless
The Lenovo IdeaPad Flex 3 Chromebook is ahead on ports and wireless.
It has an SD card reader, and the ASUS Chromebook 14 doesn't beat it on anything here.
| Spec | ASUS Chromebook 14 (CX1405) | Lenovo IdeaPad Flex 3 Chromebook |
|---|---|---|
| Ports | 1x USB-C 3.2 Gen 1 (charging, display), 1x USB-A 3.2 Gen 1, 1x HDMI 1.4, 1x 3.5 mm combo audio | 2x USB-A 3.2 Gen 1, 1x USB-C 3.2 Gen 1 (charging via 45W USB-C adapter with PD 3.0, data, DisplayPort 1.4), 1x HDMI 1.4b, 1x microSD, 1x 3.5 mm headphone/mic combo |
| Thunderbolt / USB4 | None | None |
| External displays (max) | — | 2 |
| Card reader | None | microSD |
| Ethernet | None | None |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 6 |
| Bluetooth | Bluetooth 5.4 | Bluetooth 5.2 |
| Mobile data | None | None |
Features
Both have much the same extras.
From the keyboard to the webcam and login, there is little between them.
| Spec | ASUS Chromebook 14 (CX1405) | Lenovo IdeaPad Flex 3 Chromebook |
|---|---|---|
| Webcam | 720p | 720p |
| Webcam privacy | physical shutter | physical privacy shutter |
| Backlit keyboard | No | No |
| Keyboard | spill-resistant chiclet keyboard, 1.35 mm key travel | Chrome keyboard, 6-row, numeric keypad, non-backlit |
| Number pad | — | Yes |
| Touchpad | touchpad | Buttonless Mylar surface multi-touch, 75 x 120 mm |
| Speakers | built-in speakers | 2x 2 W stereo, Waves MaxxAudio |
| Microphones | built-in microphone | dual array, Wake-on-Voice, Google Assistant |
| Pen | No | No |
| Security | Google Titan C, Kensington Nano Security Slot | Google Security Chip H1, Kensington Nano Security Slot, Camera privacy shutter |
Software and model
The ASUS Chromebook 14 is ahead on software and updates.
It gets updates for longer and is newer, and the Lenovo IdeaPad Flex 3 Chromebook doesn't beat it on anything here.
| Spec | ASUS Chromebook 14 (CX1405) | Lenovo IdeaPad Flex 3 Chromebook |
|---|---|---|
| Operating system | ChromeOS | ChromeOS |
| Updates until | June 2035 | June 2031 |
| Model number | CX1405CTA | 82T3000LUK |
| Released | 2025 | 2022 |