ASUS Zenbook 14 OLED (UX3405CA) vs Lenovo IdeaPad Slim 3
The ASUS Zenbook 14 OLED is the better laptop on paper: it lasts longer on a charge, has more storage and has an OLED screen. The Lenovo IdeaPad Slim 3 doesn't beat it on any spec that matters.
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Key differences
- Battery life ASUS Zenbook 14 OLED wins
The ASUS Zenbook 14 OLED should last longer on a charge: it has a 75 Wh battery against 60 Wh.
- Storage ASUS Zenbook 14 OLED wins
The ASUS Zenbook 14 OLED has twice the storage: 1 TB against 512 GB.
- OLED screen ASUS Zenbook 14 OLED wins
The ASUS Zenbook 14 OLED has an OLED screen, with true blacks and richer colour than the Lenovo IdeaPad Slim 3's LCD.
- Colour ASUS Zenbook 14 OLED wins
The ASUS Zenbook 14 OLED's screen shows a wider range of colour (100% DCI-P3 against 45% NTSC), so photos and films look richer and truer.
- Brightness ASUS Zenbook 14 OLED wins
The ASUS Zenbook 14 OLED's screen is brighter (400 against 300 nits), so it's easier to see near a window.
Which one should you choose?
Choose the ASUS Zenbook 14 OLED if…
- You work away from a plug: it should last longer on a charge.
- You store lots of photos, videos or games: it has 1 TB of storage.
- You watch a lot of films and video, or edit photos: its OLED screen has true blacks and rich colour.
- You edit photos or care about colour: its screen covers 100% DCI-P3.
- You work near windows or outside: its screen is brighter at 400 nits.
Choose the Lenovo IdeaPad Slim 3 if…
- You plug things in: it has an SD card reader (for camera cards).
- You might want more memory later: you can add it yourself.
- You do demanding work: its AMD Ryzen 7 170 has the power for photo and video editing.
Full spec comparison
Add more laptopsThe ASUS Zenbook 14 OLED leads on battery and weight and the screen; elsewhere the two are closely matched. Highlighted values mark the better spec in each row, and you can hide the rows where they match.
Performance
Each laptop has its strengths on performance.
The ASUS Zenbook 14 OLED has more storage, while the Lenovo IdeaPad Slim 3 can be upgraded.
| Spec | ASUS Zenbook 14 OLED (UX3405CA) | Lenovo IdeaPad Slim 3 |
|---|---|---|
| Processor | Intel Core Ultra 7 255H | AMD Ryzen 7 170 |
| Graphics | Intel Arc 140T | AMD Radeon 680M |
| AI engine (NPU) | 13 TOPS | — |
| Memory (RAM) | 16 GB | 16 GB |
| Memory type | LPDDR5X | DDR5-4800 |
| Maximum memory | 16 GB | 16 GB |
| Memory upgrades | Soldered (not upgradeable) | Upgradeable (slots) |
| Storage | 1 TB | 512 GB |
| Storage type | SSD | SSD |
| Storage interface | PCIe 4.0 NVMe M.2 2280 | PCIe 4.0 x4 NVMe M.2 2242 |
| Storage slots | 1 | 2 |
Screen
The ASUS Zenbook 14 OLED is ahead on the screen.
It has an OLED screen, has more accurate colour and has a brighter screen, and the Lenovo IdeaPad Slim 3 doesn't beat it on anything here.
| Spec | ASUS Zenbook 14 OLED (UX3405CA) | Lenovo IdeaPad Slim 3 |
|---|---|---|
| Screen size | 14" | 14" |
| Resolution | Full HD+ (1920 x 1200) | Full HD+ (1920 x 1200) |
| Aspect ratio | 16:10 | 16:10 |
| Panel | OLED | IPS |
| Refresh rate | 60 Hz | 60 Hz |
| Variable refresh (VRR) | No | No |
| Brightness | 400 nits | 300 nits |
| Colour range | 100% DCI-P3 | 45% NTSC |
| HDR | VESA DisplayHDR True Black 500 | None |
| Finish | Glossy | Matte |
| Touchscreen | Yes | No |
| Pen standard | MPP 2.0 | — |
Battery and size
The ASUS Zenbook 14 OLED is ahead on battery and weight.
It lasts longer on a charge, is a little lighter and is slimmer, and the Lenovo IdeaPad Slim 3 doesn't beat it on anything here.
| Spec | ASUS Zenbook 14 OLED (UX3405CA) | Lenovo IdeaPad Slim 3 |
|---|---|---|
| Battery life (maker claim) | — | Up to 18 hours |
| Battery capacity | 75 Wh | 60 Wh |
| Charger | 65 W | — |
| Charges via | USB-C | round tip / USB-C PD |
| Fast charging | — | 2 hours runtime from 15-minute charge (Rapid Charge Boost) |
| Weight | 1.28 kg | 1.43 kg |
| Dimensions | 312.4 x 220.1 x 14.9 mm | 314.4 x 222.1 x 17.9-18.9 mm |
| Materials | — | PC-ABS lid and base |
| Durability | US MIL-STD-810H | MIL-STD-810H |
| Colour | Ponder Blue | Luna Grey |
| Colours available | Ponder Blue, Jasper Gray, Foggy Silver | Cosmic Blue, Luna Grey |
Ports and wireless
On ports and wireless, it comes down to what you need.
The ASUS Zenbook 14 OLED has Thunderbolt or USB4, while the Lenovo IdeaPad Slim 3 has an SD card reader.
| Spec | ASUS Zenbook 14 OLED (UX3405CA) | Lenovo IdeaPad Slim 3 |
|---|---|---|
| Ports | 2x Thunderbolt 4 (USB-C, both support charging and DisplayPort, up to 40Gbps), 1x USB-A 3.2 Gen 1 (5Gbps), 1x HDMI 2.1 (TMDS), 1x 3.5 mm combo audio | 2x USB-A 5Gbps, 1x USB-C 5Gbps (USB PD 45-65W, DisplayPort 1.2), 1x HDMI 1.4, 1x 3.5 mm audio, 1x SD card reader, 1x round-tip power |
| Thunderbolt / USB4 | 2x Thunderbolt 4 (40 Gbps) | None |
| External displays (max) | — | 2 |
| Card reader | None | SD |
| Ethernet | None | None |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 7 |
| Wi-Fi card | — | Wi-Fi 7 802.11be 2x2 M.2 card |
| Bluetooth | Bluetooth 5.4 | Bluetooth 5.4 |
| Mobile data | None | None |
Features
The ASUS Zenbook 14 OLED is ahead on extras.
It has a backlit keyboard, and the Lenovo IdeaPad Slim 3 doesn't beat it on anything here.
| Spec | ASUS Zenbook 14 OLED (UX3405CA) | Lenovo IdeaPad Slim 3 |
|---|---|---|
| Webcam | 1080p + IR | 1080p + IR |
| Webcam privacy | physical shutter | physical shutter |
| Backlit keyboard | Yes | No |
| Keyboard | backlit chiclet, 1.4 mm key travel, Copilot key | 6-row, 1.3 mm travel, Copilot key, non-backlit |
| Login | Face | Face |
| Number pad | No | No |
| Touchpad | precision touchpad | 75 x 120 mm Mylar Precision touchpad |
| Speakers | Harman Kardon stereo speakers | 2x 2W, Dolby Audio |
| Microphones | built-in array microphone | dual-array |
| Pen | Supported (sold separately) | No |
| Security | TPM 2.0, Windows Hello face recognition | Firmware TPM 2.0 |
Software and model
Both run Windows.
So the same apps work on both, and they get the same kind of updates.
| Spec | ASUS Zenbook 14 OLED (UX3405CA) | Lenovo IdeaPad Slim 3 |
|---|---|---|
| Operating system | Windows 11 Home | Windows 11 Home in S mode |
| Model number | UX3405CA-QL192W | 83K60080UK |
| Released | 2025 | 2025 |