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Side-by-side specification comparison of two reference models
A full side-by-side comparison of reference models Legion Y520-15IKBN and Gram 15Z975 within the same category.
Side-by-side specification comparison of two reference models
| Specification | Legion Y520-15IKBN | Gram 15Z975 |
|---|---|---|
| Price | Not for sale | Not for sale |
| General | ||
| Brand | Lenovo | LG |
| Product Family | Legion | Gram |
| Model | Legion Y520-15IKBN | Gram 15Z975 |
| Model Number | Lenovo Legion Y520-15IKBN | 15Z975-U.AP71U1 |
| Part Number / SKU | — | 15Z975-U.AP71U1 |
| Launch Year | 2017 year | 2018 year |
| Form Factor | Clamshell | Clamshell |
| Laptop Category | Gaming | Premium / Ultraportable |
| Color | — | Dark Silver |
| Operating System | Windows 10 | Windows 10 Pro |
| Operating System Architecture | 64-bit | 64-bit |
| Processor | ||
| Processor Manufacturer | Intel | Intel |
| Processor Family | Intel Core i5 | Intel Core i7 |
| Processor Model | Intel Core i5 7300HQ 2.5GHz | Intel Core i7 8550U 1.8GHz |
| Processor Generation | 7th Gen | 8th Gen |
| CPU Architecture | x86-64 | x86-64 |
| CPU Process Node | 14 nm | 14 nm |
| CPU Cores | 4 cores | 4 cores |
| Efficiency Cores | 0 cores | 0 cores |
| CPU Threads | 4 threads | 8 threads |
| CPU Base Clock | 2.5 GHz | 1.8 GHz |
| CPU Max Boost Clock | 3.5 GHz | 4 GHz |
| L3 Cache | 6 MB | 8 MB |
| Processor Base Power | 45 W | 15 W |
| Graphics | ||
| Graphics Type | Discrete | Integrated |
| GPU Manufacturer | NVIDIA | Intel |
| GPU Model | Nvidia GeForce GTX 1050 | Intel UHD Graphics 620 |
| GPU Architecture | Pascal | — |
| VRAM Capacity | — | 0 GB |
| VRAM Type | — | Shared system memory |
| GPU Boost Clock | — | 1150 MHz |
| Maximum External Resolution | 3840 x 2160 at 30 Hz via HDMI | — |
| Memory | ||
| Installed Memory | 8 GB | 16 GB |
| Maximum Memory | 32 GB | — |
| Memory Type | DDR4 | DDR4 |
| Memory Speed | 2400 MT/s | 2400 MT/s |
| Memory Form Factor | SO-DIMM | SO-DIMM + Soldered |
| Memory Slots | 2 slots | 1 slots |
| Memory Slots Used | — | 1 slots |
| Memory Upgradeable | Yes | Partially |
| Memory Channels | Dual | Dual |
| Storage | ||
| Primary Storage Type | SSD | SSD |
| Storage Capacity | 128 GB | 512 GB |
| Storage Interface | PCIe NVMe + SATA | SATA III |
| Storage PCIe Generation | PCIe 3.0 | — |
| Storage Form Factor | M.2 + 2.5-inch | M.2 2280 |
| Installed Storage Drives | 2 drives | 1 drives |
| Maximum Storage Drives | 2 drives | — |
| M.2 Storage Slots | 1 slots | — |
| 2.5-inch Drive Bay | Yes | — |
| RAID Support | — | — |
| Card Reader | Yes | Yes |
| Card Reader Formats | MMC, SD, SDHC, SDXC | microSD |
| Display | ||
| Display Size | 15.6 inch | 15.6 inch |
| Display Resolution | 1920 x 1080 | 1920 x 1080 |
| Resolution Class | FHD | FHD |
| Display Technology | IPS LCD | IPS LCD |
| Panel Type | IPS | IPS |
| Display Brightness | 250 nits | — |
| sRGB Color Gamut | — | 100 % |
| Aspect Ratio | 16:9 | 16:9 |
| Display Finish | Anti-glare | — |
| Adaptive Sync Technology | — | — |
| Camera & Biometrics | ||
| Webcam Resolution | 720p (1.0 MP) | HD |
| Fingerprint Reader | — | Yes |
| Audio | ||
| Speaker Configuration | 2 Harman speakers | Stereo 2-speaker |
| Speaker Power | 2 x 2 W | 1 x 2 W |
| Audio Technology | Harman; Dolby Audio | DTS Headphone:X |
| Microphone Configuration | Dual-array microphone | — |
| Audio Jack | Yes | Yes |
| Keyboard & Input | ||
| Keyboard Type | 6-row keyboard | — |
| Keyboard Backlight | — | Yes |
| Keyboard RGB Zones | — | — |
| Numeric Keypad | Yes | — |
| Touchpad Type | One-piece touchpad | — |
| Wireless & Networking | ||
| Wi-Fi Standard | Wi-Fi 5 | Wi-Fi 5 |
| Wi-Fi IEEE Standard | 802.11ac | 802.11ac |
| Wi-Fi Bands | Dual-band | 2.4 GHz, 5 GHz |
| Wi-Fi Spatial Streams | — | 2x2 |
| Bluetooth Version | 4.1 | Bluetooth 4.1 |
| Ethernet | Yes | Yes |
| Ethernet Speed | 1 GbE | 10/100 via adapter |
| WWAN | No | No |
| SIM Slot | — | — |
| Ports & Expansion | ||
| USB Type-A Port Count | 3 ports | 3 ports |
| USB Type-A Specifications | 2x USB 3.1 Gen 1; 1x USB 2.0 | USB 3.0 x 2, USB 2.0 x 1 |
| USB Type-C Port Count | 1 ports | 1 ports |
| USB Type-C Specifications | 1x USB-C 3.1 Gen 1 / DisplayPort 1.2 | USB Type-C x 1 |
| USB4 Port Count | 0 ports | 0 ports |
| Thunderbolt Port Count | 0 ports | 0 ports |
| HDMI Port Count | 1 ports | 1 ports |
| HDMI Version | 1.4 | — |
| DisplayPort Output | DisplayPort 1.2 via USB-C | — |
| RJ-45 Port Count | 1 ports | 0 ports |
| 3.5 mm Audio Combo Port Count | 1 ports | 1 ports |
| SD Card Slot Count | 1 ports | 0 ports |
| microSD Card Slot Count | 0 ports | 1 ports |
| Smart Card Reader | No | No |
| Security Lock Slot | Yes | — |
| Internal PCIe Slots | 1x M.2 storage slot | — |
| Battery & Power | ||
| Battery Capacity | 45 Wh | 60.06 Wh |
| Battery Cells | 3 cells | 4 cells |
| Battery Chemistry | Li-polymer | Lithium-ion polymer |
| Battery Life | 4 hours | 13.4 hours |
| Battery Life Test Method | Lenovo internal estimate | MobileMark 2014 |
| Power Adapter | 135 W | — |
| Power Connector | Barrel (round-tip) | DC-In |
| USB-C Charging | — | Yes |
| Dimensions & Build | ||
| Width | 380 mm | 358.14 mm |
| Depth | 265 mm | 228.6 mm |
| Thickness | 25.8 mm | 15.24 mm |
| Weight | 2.5 kg | 1.09 kg |
| Chassis Material | PC/ABS | Metal alloy, Nano Carbon, Magnesium |
| Lid Material | PC/ABS | — |
| Base Material | PC/ABS | — |
| MIL-STD Testing | — | MIL-STD-810G |
| Security & Manageability | ||
| TPM | — | Firmware TPM (Intel PTT) |
| BIOS / UEFI Password Support | Yes | Yes |
| Drive Password Support | Yes | Yes |
| Enterprise Manageability | — | — |
| Smart Card Support | No | No |
| BIOS Recovery / Self-Healing | — | — |
| Certifications & Sustainability | ||
| ENERGY STAR | ENERGY STAR 6.1 | — |
| EPEAT | Silver | — |
| RoHS Compliance | Yes | — |
| Environment & Warranty | ||
| Warranty | — | 1 years |
| Warranty Type | — | Parts and labor |
Legion Y520-15IKBN and Gram 15Z975 share specifications such as Display Size (15.6 inch), Display Resolution (1920 x 1080), Form Factor (Clamshell), Operating System Architecture (64-bit).
The main differences: Processor Model (Legion Y520-15IKBN: Intel Core i5 7300HQ 2.5GHz, Gram 15Z975: Intel Core i7 8550U 1.8GHz); GPU Model (Legion Y520-15IKBN: Nvidia GeForce GTX 1050, Gram 15Z975: Intel UHD Graphics 620); Installed Memory (Legion Y520-15IKBN: 8 GB, Gram 15Z975: 16 GB); Storage Capacity (Legion Y520-15IKBN: 128 GB, Gram 15Z975: 512 GB).
Legion Y520-15IKBN may suit users who need its differing values, while Gram 15Z975 benefits those who need its paired strengths. Review the specs table above before deciding.
