Asus ROG Strix G18 G815 RTX 5080 (2026) vs Asus ROG Strix G18 G815 RTX 5090 (2026)
What ROG Strix G18 G815 RTX 5080 (2026) does better (0) and where ROG Strix G18 G815 RTX 5090 (2026) wins (4) — every spec side by side.
vs
7.1Graphics9.1
8.8Overall performance9.6
8.3Display8.3
5.1Memory & storage5.1
2.3Battery & portability2.3
7.5Features & cooling7.5
Dimensions
Size comparison
ROG Strix G18 G815 RTX 5080 (2026)ROG Strix G18 G815 RTX 5090 (2026)
| ROG Strix G18 G815 RTX 5080 (2026) | ROG Strix G18 G815 RTX 5090 (2026) | Difference | |
|---|---|---|---|
| Depth | 294 mm | 294 mm | = |
| Width | 399 mm | 399 mm | = |
| Thickness | 32 mm | 32 mm | = |
| Weight | 3.5 kg | 3.5 kg | = |
Drawn to the same scale from the official dimensions (front and side).
Why is ROG Strix G18 G815 RTX 5080 (2026) better than ROG Strix G18 G815 RTX 5090 (2026)?
ROG Strix G18 G815 RTX 5080 (2026) has no measurable advantages in this pair.
Why is ROG Strix G18 G815 RTX 5090 (2026) better than ROG Strix G18 G815 RTX 5080 (2026)?
- GPU compute (FP32)42 TFLOPS vs 51.4 TFLOPS+22%
- 3DMark Steel Nomad Light26,124 vs 30,794+18%
- Video memory16 GB vs 24 GB+50%
- GPU shader cores7,680 vs 10,496+37%
Specifications
Side by side
| Graphics | ||
| Graphics card | GeForce RTX 5080 Laptop | GeForce RTX 5090 Laptop |
| GPU maker | NVIDIA | NVIDIA |
| GPU power (TGP) | 175 W | 175 W |
| Video memory | 16 GB | 24 GB |
| Video memory type | GDDR7 | GDDR7 |
| GPU shader cores | 7,680 | 10,496 |
| GPU compute (FP32) | 42 TFLOPS | 51.4 TFLOPS |
| 3DMark Steel Nomad Light | 26,124 | 30,794 |
| Processor | ||
| Processor | Core Ultra 9 290HX Plus | Core Ultra 9 290HX Plus |
| CPU maker | Intel | Intel |
| CPU cores | 24 | 24 |
| CPU threads | 24 | 24 |
| Max CPU clock | 5.5 GHz | 5.5 GHz |
| Processor options | Core Ultra 9 290HX Plus | Core Ultra 9 290HX Plus |
| Geekbench 6 multi-core | 23,356 | 23,356 |
| Geekbench 6 single-core | 3,484 | 3,484 |
| Cinebench 2024 multi-core | 2,626 | 2,626 |
| Display | ||
| Screen size | 18″ | 18″ |
| Resolution | 2560 × 1600 | 2560 × 1600 |
| Resolution class | QHD (1440p/1600p) | QHD (1440p/1600p) |
| Refresh rate | 300 Hz | 300 Hz |
| Panel type | IPS | IPS |
| Brightness | 500 nits | 500 nits |
| sRGB coverage | 100% | 100% |
| Response time | 3 ms | 3 ms |
| DCI-P3 coverage | 100% | 100% |
| Pixel density | 168 ppi | 168 ppi |
| Aspect ratio | 16:10 | 16:10 |
| G-Sync / FreeSync | Yes | Yes |
| Advanced Optimus | No | No |
| MUX switch | Yes | Yes |
| HDR | Yes | Yes |
| Touchscreen | No | No |
| Memory & storage | ||
| RAM (up to) | 64 GB | 64 GB |
| RAM (base) | 16 GB | 16 GB |
| RAM type | DDR5 | DDR5 |
| RAM speed | 5,600 MHz | 5,600 MHz |
| Max. supported RAM | 64 GB | 64 GB |
| RAM slots | 2 | 2 |
| Upgradable RAM | Yes | Yes |
| SSD (up to) | 4,096 GB | 4,096 GB |
| SSD (base) | 1,024 GB | 1,024 GB |
| M.2 SSD slots | 2 | 2 |
| SSD interface | PCIe 4.0 x4 | PCIe 4.0 x4 |
| Battery & power | ||
| Battery capacity | 90 Wh | 90 Wh |
| Power adapter | 380 W | 380 W |
| USB-C charging (Power Delivery) | Yes | Yes |
| USB-C charging power | 100 W | 100 W |
| Design & cooling | ||
| Weight | 3.5 kg | 3.5 kg |
| Thickness | 32 mm | 32 mm |
| Width | 399 mm | 399 mm |
| Depth | 294 mm | 294 mm |
| Body material | Plastic | Plastic |
| Colours | Gray, Green | Gray, Green |
| Cooling fans | 3 | 3 |
| Vapor chamber cooling | Yes | Yes |
| Liquid metal (CPU) | Yes | Yes |
| Ports & wireless | ||
| Thunderbolt / USB4 | Thunderbolt 5 | Thunderbolt 5 |
| Thunderbolt or USB4 | Yes | Yes |
| USB-C ports | 2 | 2 |
| USB-A ports | 3 | 3 |
| HDMI | HDMI 2.1 | HDMI 2.1 |
| HDMI 2.1 | Yes | Yes |
| (Mini) DisplayPort | No | No |
| Ethernet port | Yes | Yes |
| SD card reader | No | No |
| 3.5 mm audio jack | Yes | Yes |
| Wi-Fi standard | Wi-Fi 7 | Wi-Fi 7 |
| Bluetooth | 5.4 | 5.4 |
| Keyboard & camera | ||
| Backlit keyboard | Yes | Yes |
| Numeric keypad | Yes | Yes |
| Key travel | 1.7 mm | 1.7 mm |
| Webcam | 1,080p | 1,080p |
| IR camera (face login) | Yes | Yes |
| Fingerprint reader | No | No |
| Audio | ||
| Speakers | 2.0 | 2.0 |
| Dolby Atmos | Yes | Yes |
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