Asus ROG Zephyrus G15 GA503 vs Lenovo Legion 9i Gen 10 (2025)
[ VERDICT ]
Winner: Lenovo Legion 9i Gen 10 (2025) (89/100)
Lenovo Legion 9i Gen 10 (2025) leads overall with a score of 89/100 compared to Asus ROG Zephyrus G15 GA503 (42/100), offering superior measured performance and technical specifications.
Benchmark Performance Comparison
Normalized Lab Scores| Benchmark | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Gaming | 25.0 Poor | 92.0 Excellent WINNER |
| NanoReview Score | 42.0 Poor | 89.0 Very Good WINNER |
| Performance | 45.0 Poor | 96.0 Excellent WINNER |
Detailed Technical Specifications
Battery
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Battery type | Li-Ion | Li-Po |
| Charge power | 180 / 200 W | 400 W |
| Charging port position | Left | Left, Bottom |
| Charging via USB (Power Delivery) | Yes | Yes, 140 W |
| Fast charging | Yes | Yes |
| Full charging time | 1:30 hr | — |
| Replaceable | No | No |
| Weight of AC adapter | 490 grams | 1247 grams |
CPU
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Base frequency | 2.8 GHz | 2.7 GHz |
| Cores | 8 | 24 (8P + 16E) |
| Fabrication process | 7 nm | 3 nm |
| Integrated GPU | Radeon RX Vega 8 | Arc Graphics (4-Cores) |
| L3 Cache | 16 MB | 36 MB |
| Threads | 16 | 24 |
| Turbo frequency | 4.4 GHz | 5.4 GHz |
Case
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Area | 863 cm2(133.8 inches2) | 1195 cm2(185.2 inches2) |
| Colors | White, Black, Gray | Black |
| Cooling system | Active | Active |
| Dimensions | 355 x 243 x 19.9 mm13.98 x 9.57 x 0.78 inches | 403 x 296.5 x 23.9-27.95 mm15.87 x 11.67 x 0.94-1.1 inches |
| Liquid metal | Yes | Yes |
| Material | Aluminum | Aluminum |
| Noise level (max. load) | 51 dB | 56 dB |
| Number of fans | 2 | 4 |
| Opening angle | 180° | 180° |
| Screen-to-body ratio | ~77.8% | ~78.6% |
| Side bezels | 4.8 mm | 7.7 mm |
| Transformer | No | No |
| Vapor chamber | No | Yes |
| Weight | 1.9 kg (4.19 lbs) | 3.5 kg (7.72 lbs) |
Connectivity
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Audio jack (3.5 mm) | Yes | Yes |
| Bluetooth | v5.2 | v5.4 |
| DisplayPort | No | No |
| Ethernet (RJ45) | Yes | Yes |
| Fingerprint | Optional | No |
| HDMI | 1x HDMI 2.0 | 1x HDMI 2.1 |
| Infrared sensor | No | Yes |
| Optical drive | No | No |
| Proprietary charging port | Yes | Yes |
| SD card reader | Yes | Yes |
| Thunderbolt | No | Thunderbolt 5 |
| USB Type-C | 2x USB 3.2 | 3x USB 4.0 |
| USB-A | 2x USB 3.2 | 3x USB 3.2 |
| VGA | No | No |
| Wi-Fi standard | v6 | v7 |
| Webcam | — | Above the display |
| Webcam resolution | — | 2560 x 1440 |
Display
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Adobe RGB profile | 47.3% | 96.8% |
| Ambient light sensor | No | — |
| Aspect ratio | 16:9 | 16:10 |
| Coating | Matte | Glossy |
| HDR support | No | Yes, Dolby Vision |
| PPI | 141 ppi | 252 ppi |
| Refresh rate | 144 Hz | 240 Hz |
| Resolution | 1920 x 1080 pixels | 3840 x 2400 pixels |
| Size | 15.6 inches | 18 inches |
| Sync technology | FreeSync | G-Sync |
| Touchscreen | No | No |
| Type | IPS LCD | Mini LED |
| sRGB color space | 62.3% | 100% |
| Contrast | — | 1200:1 |
| DCI-P3 color gamut | — | 88.9% |
| Response time | — | 3 ms |
GPU Benchmarks
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Blender GPU | 1320 | 7717 |
| Solar Bay | 23340 | 123422 |
Graphics Card
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| FLOPS | 8.2 TFLOPS | 42 TFLOPS |
| GPU base clock | 1350 MHz | 975 MHz |
| GPU boost clock | 1598 MHz | — |
| GPU performance | 8.2 TFLOPS | 42 TFLOPS |
| Memory bus | 128 bit | 256 bit |
| Memory size | 4 GB | 16 GB |
| Memory speed | 12 Gbps | ~28 Gbps |
| Memory type | GDDR6 | GDDR7 |
| Nvidia Optimus | Yes | MUX |
| Raster operations pipelines (ROPs) | 48 | 96 |
| Shading units (cores) | 2560 | 7680 |
| TGP | 60-75 W | 175 W |
| Texture mapping units (TMUs) | 80 | 240 |
Input
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Backlight | Yes | Yes |
| Key travel | 1.7 mm | 1.6 mm |
| Keyboard type | Island | Island |
| Numpad | No | Yes |
| Surface | Plastic | Glass |
| Windows Precision | Yes | Yes |
RAM
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Channels | 1x8 GB | 2x16 GB |
| Clock | 3200 MHz | 5600 MHz |
| Max. ram size | 48 GB | 192 GB |
| Total slots | 1 | 4 |
| Upgradable | Yes | Yes |
Sound
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Audio chip | Realtek ALC289 | Realtek ALC3306 |
| Dolby Atmos | Yes | No |
| Loudness | ~78 dB | ~79 dB |
| Microphones | 2 | 2 |
| Power | 2x2W, 2x2W | 2x2W, 2x2W |
| Speakers | 2.2 (2 tweeters and 2 woofers) | 2.2 (2 tweeters and 2 woofers) |
Storage
| Specification | Asus ROG Zephyrus G15 GA503 | Lenovo Legion 9i Gen 10 (2025) |
|---|---|---|
| Bus | PCI-E Gen 3.0 (4x) | PCI-E Gen 5.0 (4x) |
| NVMe | Yes | Yes |
| Storage type | SSD (M2) | SSD (M2) |
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