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Side-by-side specification comparison of two reference models
A full side-by-side comparison of reference models Zenbook S 14 and Legion Y520-15IKBN within the same category.
Side-by-side specification comparison of two reference models
| Specification | Zenbook S 14 | Legion Y520-15IKBN |
|---|---|---|
| Price | Not for sale | Not for sale |
| General | ||
| Brand | ASUS | Lenovo |
| Product Family | Zenbook | Legion |
| Model | Zenbook S 14 | Legion Y520-15IKBN |
| Model Number | UX5406SA | Lenovo Legion Y520-15IKBN |
| Launch Year | 2025 year | 2017 year |
| Form Factor | Clamshell | Clamshell |
| Laptop Category | Premium / Ultraportable | Gaming |
| Operating System | — | Windows 10 |
| Operating System Architecture | 64-bit | 64-bit |
| Processor | ||
| Processor Manufacturer | Intel | Intel |
| Processor Family | Intel Core Ultra 7 | Intel Core i5 |
| Processor Model | Intel Core Ultra 7 258V | Intel Core i5 7300HQ 2.5GHz |
| Processor Generation | Intel Core Ultra Series 2 | 7th Gen |
| CPU Architecture | x86-64 | x86-64 |
| CPU Process Node | 3 nm | 14 nm |
| CPU Cores | 8 cores | 4 cores |
| Performance Cores | 4 cores | — |
| Efficiency Cores | 4 cores | 0 cores |
| CPU Threads | 8 threads | 4 threads |
| CPU Base Clock | 2.2 GHz | 2.5 GHz |
| CPU Max Boost Clock | 4.8 GHz | 3.5 GHz |
| L3 Cache | 12 MB | 6 MB |
| Processor Base Power | 17 W | 45 W |
| Maximum Processor Power | 37 W | — |
| CPU Manageability Technology | Intel Standard Manageability | — |
| AI / NPU | ||
| NPU | Yes | — |
| NPU Model | Intel AI Boost | — |
| NPU Performance | 47 TOPS | — |
| Platform AI Performance | 115 TOPS | — |
| Copilot+ PC | Yes | — |
| Graphics | ||
| Graphics Type | Integrated | Discrete |
| GPU Manufacturer | Intel | NVIDIA |
| GPU Model | Intel Arc 140V | Nvidia GeForce GTX 1050 |
| GPU Architecture | Xe2 | Pascal |
| VRAM Capacity | 0 GB | — |
| VRAM Type | Shared system memory | — |
| Maximum External Displays | 4 displays | — |
| Maximum External Resolution | — | 3840 x 2160 at 30 Hz via HDMI |
| Memory | ||
| Installed Memory | 32 GB | 8 GB |
| Maximum Memory | 32 GB | 32 GB |
| Memory Type | LPDDR5X | DDR4 |
| Memory Speed | 8533 MT/s | 2400 MT/s |
| Memory Form Factor | On-package | SO-DIMM |
| Memory Slots | 0 slots | 2 slots |
| Memory Slots Used | 0 slots | — |
| Memory Upgradeable | No | Yes |
| Memory Channels | Dual-channel | Dual |
| Storage | ||
| Primary Storage Type | SSD | SSD |
| Storage Capacity | 1024 GB | 128 GB |
| Storage Interface | PCIe NVMe | PCIe NVMe + SATA |
| Storage PCIe Generation | PCIe 4.0 | PCIe 3.0 |
| Storage Form Factor | M.2 2280 | M.2 + 2.5-inch |
| Installed Storage Drives | 1 drives | 2 drives |
| Maximum Storage Drives | 1 drives | 2 drives |
| M.2 Storage Slots | 1 slots | 1 slots |
| 2.5-inch Drive Bay | — | Yes |
| RAID Support | — | — |
| Card Reader | — | Yes |
| Card Reader Formats | — | MMC, SD, SDHC, SDXC |
| Display | ||
| Display Size | 14 inch | 15.6 inch |
| Display Resolution | — | 1920 x 1080 |
| Resolution Class | — | FHD |
| Display Technology | OLED | IPS LCD |
| Panel Type | OLED | IPS |
| Display Brightness | — | 250 nits |
| DCI-P3 Color Gamut | 100 % | — |
| Aspect Ratio | 16:10 | 16:9 |
| Response Time | 0.2 ms | — |
| Display Finish | — | Anti-glare |
| Adaptive Sync Technology | — | — |
| Screen-to-Body Ratio | 90 % | — |
| Camera & Biometrics | ||
| Webcam Resolution | 1080p | 720p (1.0 MP) |
| IR Camera | Yes | — |
| Windows Hello Face | Yes | — |
| Presence Detection | Yes | — |
| Camera Features | ASUS AI Camera; FHD IR with Windows Hello | — |
| Audio | ||
| Speaker Configuration | 4 speakers | 2 Harman speakers |
| Speaker Power | — | 2 x 2 W |
| Audio Technology | Smart Amp | Harman; Dolby Audio |
| Microphone Configuration | Array microphone | Dual-array microphone |
| Audio Jack | Yes | Yes |
| Keyboard & Input | ||
| Keyboard Type | Backlit Chiclet Keyboard | 6-row keyboard |
| Keyboard Backlight | Yes | — |
| Keyboard RGB Zones | — | — |
| Numeric Keypad | — | Yes |
| Key Travel | 1.1 mm | — |
| Copilot Key | Yes | — |
| Touchpad Type | Precision Touchpad | One-piece touchpad |
| Wireless & Networking | ||
| Wi-Fi Standard | Wi-Fi 7 | Wi-Fi 5 |
| Wi-Fi IEEE Standard | 802.11be | 802.11ac |
| Wi-Fi Bands | Tri-band | Dual-band |
| Wi-Fi Spatial Streams | 2x2 | — |
| Wi-Fi Module | Intel Wi-Fi 7 BE201 | — |
| Bluetooth Version | 5.4 | 4.1 |
| Ethernet | — | Yes |
| Ethernet Speed | — | 1 GbE |
| WWAN | No | No |
| SIM Slot | — | — |
| Ports & Expansion | ||
| USB Type-A Port Count | 1 ports | 3 ports |
| USB Type-A Specifications | USB 3.2 Gen 2 (10 Gbps) | 2x USB 3.1 Gen 1; 1x USB 2.0 |
| USB Type-C Port Count | 2 ports | 1 ports |
| USB Type-C Specifications | Thunderbolt 4, DisplayPort, Power Delivery | 1x USB-C 3.1 Gen 1 / DisplayPort 1.2 |
| USB4 Port Count | 2 ports | 0 ports |
| USB4 Speed | 40 Gbps | — |
| Thunderbolt Port Count | 2 ports | 0 ports |
| Thunderbolt Version | Thunderbolt 4 | — |
| HDMI Port Count | 1 ports | 1 ports |
| HDMI Version | 2.1 TMDS | 1.4 |
| DisplayPort Output | Yes | DisplayPort 1.2 via USB-C |
| RJ-45 Port Count | 0 ports | 1 ports |
| 3.5 mm Audio Combo Port Count | 1 ports | 1 ports |
| SD Card Slot Count | 0 ports | 1 ports |
| microSD Card Slot Count | 0 ports | 0 ports |
| Smart Card Reader | No | No |
| Security Lock Slot | — | Yes |
| Internal PCIe Slots | 1 x M.2 2280 PCIe 4.0 x4 | 1x M.2 storage slot |
| Battery & Power | ||
| Battery Capacity | 72 Wh | 45 Wh |
| Battery Cells | 4 cells | 3 cells |
| Battery Chemistry | Li-ion | Li-polymer |
| Battery Life | 27 hours | 4 hours |
| Battery Life Test Method | — | Lenovo internal estimate |
| Fast Charging | Yes | — |
| Fast Charge Level | 60 % | — |
| Fast Charge Time | 49 min | — |
| Power Adapter | 65 W | 135 W |
| Power Connector | USB-C | Barrel (round-tip) |
| USB-C Charging | Yes | — |
| Maximum USB-C Charging Power | 65 W | — |
| Dimensions & Build | ||
| Width | 310.3 mm | 380 mm |
| Depth | 214.7 mm | 265 mm |
| Thickness | 12.9 mm | 25.8 mm |
| Weight | 1.2 kg | 2.5 kg |
| Chassis Material | All-metal chassis with Ceraluminum cover | PC/ABS |
| Lid Material | Ceraluminum | PC/ABS |
| Base Material | Metal | PC/ABS |
| MIL-STD Testing | MIL-STD-810H | — |
| Security & Manageability | ||
| TPM | Firmware TPM | — |
| Microsoft Pluton | Yes | — |
| BIOS / UEFI Password Support | — | Yes |
| Drive Password Support | — | Yes |
| Enterprise Manageability | — | — |
| Smart Card Support | — | No |
| BIOS Recovery / Self-Healing | — | — |
| Certifications & Sustainability | ||
| ENERGY STAR | ENERGY STAR 8.0 | ENERGY STAR 6.1 |
| EPEAT | EPEAT Gold | Silver |
| RoHS Compliance | Yes | Yes |
Zenbook S 14 and Legion Y520-15IKBN share specifications such as Form Factor (Clamshell), Operating System Architecture (64-bit), Processor Manufacturer (Intel), CPU Architecture (x86-64).
The main differences: Processor Model (Zenbook S 14: Intel Core Ultra 7 258V, Legion Y520-15IKBN: Intel Core i5 7300HQ 2.5GHz); GPU Model (Zenbook S 14: Intel Arc 140V, Legion Y520-15IKBN: Nvidia GeForce GTX 1050); Installed Memory (Zenbook S 14: 32 GB, Legion Y520-15IKBN: 8 GB); Storage Capacity (Zenbook S 14: 1024 GB, Legion Y520-15IKBN: 128 GB).
Zenbook S 14 may suit users who need its differing values, while Legion Y520-15IKBN benefits those who need its paired strengths. Review the specs table above before deciding.
