Acer Predator Helios 18 AI RTX 5090 (2025) vs Lenovo Legion 9i Gen 9 RTX 4090 (2024)
What Predator Helios 18 AI RTX 5090 (2025) does better (18) and where Legion 9i Gen 9 RTX 4090 (2024) wins (11) — every spec side by side.
vs
9.3Graphics9.6
9.3Overall performance9.7
9.6Display9.6
9.6Memory & storage8.7
8.0Battery & portability9.0
6.8Features & cooling9.0
Dimensions
Size comparison
Predator Helios 18 AI RTX 5090 (2025)Legion 9i Gen 9 RTX 4090 (2024)
| Predator Helios 18 AI RTX 5090 (2025) | Legion 9i Gen 9 RTX 4090 (2024) | Difference | |
|---|---|---|---|
| Depth | 307.9 mm | 277.7 mm | +30.2 mm |
| Width | 401 mm | 357.7 mm | +43.3 mm |
| Thickness | 29.6 mm | 22.7 mm | +6.9 mm |
| Weight | 3.2 kg | 2.5 kg | +0.7 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is Predator Helios 18 AI RTX 5090 (2025) better than Legion 9i Gen 9 RTX 4090 (2024)?
- RAM (up to)192 GB vs 64 GB3×
- Refresh rate250 Hz vs 165 Hz+52%
- SSD (up to)8,192 GB vs 4,096 GB2×
- 3DMark Steel Nomad Light31,590 vs 24,788+27%
- Geekbench 6 multi-core22,453 vs 19,717+14%
- GPU compute (FP32)51.4 TFLOPS vs 45.2 TFLOPS+14%
- Video memory24 GB vs 16 GB+50%
- Max. supported RAM192 GB vs 64 GB3×
- Advanced OptimusYes · Legion 9i Gen 9 RTX 4090 (2024): No
- IR camera (face login)Yes · Legion 9i Gen 9 RTX 4090 (2024): No
- Cinebench 2024 multi-core2,147 vs 1,888+14%
- GPU shader cores10,496 vs 9,728+8%
Why is Legion 9i Gen 9 RTX 4090 (2024) better than Predator Helios 18 AI RTX 5090 (2025)?
- Resolution classQHD (1440p/1600p) vs 3K (1800p/2000p)
- Weight3.2 kg vs 2.54 kg+26%
- Response time3 ms vs 1 ms3×
- Thickness29.6 mm vs 22.7 mm+30%
- RAM (base)16 GB vs 32 GB2×
- Brightness1,000 nits vs 1,200 nits+20%
- Cooling fans2 vs 3+50%
- USB-C ports2 vs 3+50%
- Pixel density168 ppi vs 236 ppi+40%
- CPU threads24 vs 32+33%
- Max CPU clock5.4 GHz vs 5.8 GHz+7%
Specifications
Side by side
| Graphics | ||
| Graphics card | GeForce RTX 5090 Laptop | GeForce RTX 4090 Laptop |
| GPU maker | NVIDIA | NVIDIA |
| GPU power (TGP) | 175 W | 175 W |
| Video memory | 24 GB | 16 GB |
| Video memory type | GDDR7 | GDDR6 |
| GPU shader cores | 10,496 | 9,728 |
| GPU compute (FP32) | 51.4 TFLOPS | 45.2 TFLOPS |
| 3DMark Steel Nomad Light | 31,590 | 24,788 |
| Processor | ||
| Processor | Core Ultra 9 275HX | Core i9-14900HX |
| CPU maker | Intel | Intel |
| CPU cores | 24 | 24 |
| CPU threads | 24 | 32 |
| Max CPU clock | 5.4 GHz | 5.8 GHz |
| Processor options | Core Ultra 9 275HX | Core i9-14900HX |
| Geekbench 6 multi-core | 22,453 | 19,717 |
| Geekbench 6 single-core | 3,306 | 3,232 |
| Cinebench 2024 multi-core | 2,147 | 1,888 |
| Display | ||
| Screen size | 18″ | 16″ |
| Resolution | 2560 × 1600 | 3200 × 2000 |
| Resolution class | QHD (1440p/1600p) | 3K (1800p/2000p) |
| Refresh rate | 250 Hz | 165 Hz |
| Panel type | Mini-LED | Mini-LED |
| Brightness | 1,000 nits | 1,200 nits |
| sRGB coverage | 100% | 100% |
| Response time | 3 ms | 1 ms |
| DCI-P3 coverage | 100% | 100% |
| Pixel density | 168 ppi | 236 ppi |
| Aspect ratio | 16:10 | 16:10 |
| G-Sync / FreeSync | Yes | Yes |
| Advanced Optimus | Yes | No |
| MUX switch | Yes | Yes |
| HDR | Yes | Yes |
| Touchscreen | No | No |
| Memory & storage | ||
| RAM (up to) | 192 GB | 64 GB |
| RAM (base) | 16 GB | 32 GB |
| RAM type | DDR5 | DDR5 |
| RAM speed | 6,400 MHz | 5,600 MHz |
| Max. supported RAM | 192 GB | 64 GB |
| RAM slots | 4 | 2 |
| Upgradable RAM | Yes | Yes |
| SSD (up to) | 8,192 GB | 4,096 GB |
| SSD (base) | 1,024 GB | 1,024 GB |
| M.2 SSD slots | 3 | 2 |
| SSD interface | PCIe 5.0 x4 | PCIe 4.0 x4 |
| Battery & power | ||
| Battery capacity | 99 Wh | 100 Wh |
| Power adapter | 330 W | 330 W |
| USB-C charging (Power Delivery) | Yes | Yes |
| USB-C charging power | 140 W | 140 W |
| Design & cooling | ||
| Weight | 3.2 kg | 2.54 kg |
| Thickness | 29.6 mm | 22.7 mm |
| Width | 401 mm | 357.7 mm |
| Depth | 307.9 mm | 277.7 mm |
| Body material | Aluminium, Plastic | Aluminium |
| Colours | Blue | Black |
| Cooling fans | 2 | 3 |
| Vapor chamber cooling | No | No |
| Liquid metal (CPU) | Yes | Yes |
| Fan noise (max. load) | 50.3 dB | 55.5 dB |
| Ports & wireless | ||
| Thunderbolt / USB4 | Thunderbolt 5 | Thunderbolt 4 |
| Thunderbolt or USB4 | Yes | Yes |
| USB-C ports | 2 | 3 |
| USB-A ports | 3 | 2 |
| HDMI | HDMI 2.1 | HDMI 2.1 |
| HDMI 2.1 | Yes | Yes |
| (Mini) DisplayPort | No | No |
| Ethernet port | Yes | Yes |
| SD card reader | Yes | Yes |
| 3.5 mm audio jack | Yes | Yes |
| Wi-Fi standard | Wi-Fi 7 | Wi-Fi 7 |
| Bluetooth | 5.4 | 5.3 |
| Keyboard & camera | ||
| Backlit keyboard | Yes | Yes |
| Numeric keypad | Yes | Yes |
| Key travel | — | 1.5 mm |
| Webcam | 1,080p | 1,080p |
| IR camera (face login) | Yes | No |
| Fingerprint reader | No | Yes |
| Audio | ||
| Speakers | 6.0 | 2.0 |
| Dolby Atmos | No | No |
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