Asus ROG Strix Scar 16 G635 RTX 5090 (2025) vs Asus ROG Zephyrus Duo 16 GX651 RTX 5090 (2026)
What ROG Strix Scar 16 G635 RTX 5090 (2025) does better (11) and where ROG Zephyrus Duo 16 GX651 RTX 5090 (2026) wins (12) — every spec side by side.
vs
9.7Graphics9.1
9.7Overall performance9.0
9.6Display8.9
6.7Memory & storage8.1
3.1Battery & portability4.9
9.6Features & cooling9.7
Dimensions
Size comparison
ROG Strix Scar 16 G635 RTX 5090 (2025)ROG Zephyrus Duo 16 GX651 RTX 5090 (2026)
| ROG Strix Scar 16 G635 RTX 5090 (2025) | ROG Zephyrus Duo 16 GX651 RTX 5090 (2026) | Difference | |
|---|---|---|---|
| Depth | 268 mm | 246 mm | +22 mm |
| Width | 354 mm | 355 mm | −1 mm |
| Thickness | 31 mm | 24.9 mm | +6.1 mm |
| Weight | 2.8 kg | 2.8 kg | = |
Drawn to the same scale from the official dimensions (front and side).
Why is ROG Strix Scar 16 G635 RTX 5090 (2025) better than ROG Zephyrus Duo 16 GX651 RTX 5090 (2026)?
- Refresh rate240 Hz vs 120 Hz2×
- Brightness1,200 nits vs 500 nits2.4×
- GPU power (TGP)175 W vs 135 W+30%
- GPU compute (FP32)51.4 TFLOPS vs 41.6 TFLOPS+24%
- CPU cores24 vs 16+50%
- RAM (base)64 GB vs 16 GB4×
- 3DMark Steel Nomad Light29,079 vs 26,964+8%
- Upgradable RAMYes · ROG Zephyrus Duo 16 GX651 RTX 5090 (2026): No
- Cooling fans3 vs 2+50%
- USB-A ports3 vs 2+50%
- Max CPU clock5.4 GHz vs 4.9 GHz+10%
Why is ROG Zephyrus Duo 16 GX651 RTX 5090 (2026) better than ROG Strix Scar 16 G635 RTX 5090 (2025)?
- SSD (up to)1,000 GB vs 4,096 GB4.1×
- Resolution classQHD (1440p/1600p) vs 3K (1800p/2000p)
- Panel typeMini-LED vs OLED
- Response time3 ms vs 1 ms3×
- Thickness31 mm vs 24.9 mm+24%
- RAM typeDDR5 vs LPDDR5X
- SD card readerNo · ROG Strix Scar 16 G635 RTX 5090 (2025): Yes
- RAM speed5,600 MHz vs 8,533 MHz+52%
- Pixel density189 ppi vs 212 ppi+12%
- Bluetooth5.4 vs 6+11%
- Fan noise (max. load)57.2 dB vs 54.1 dB+6%
- SSD (base)1,000 GB vs 1,024 GB+2%
Specifications
Side by side
| Graphics | ||
| Graphics card | GeForce RTX 5090 Laptop | GeForce RTX 5090 Laptop |
| GPU maker | NVIDIA | NVIDIA |
| GPU power (TGP) | 175 W | 135 W |
| Video memory | 24 GB | 24 GB |
| Video memory type | GDDR7 | GDDR7 |
| GPU shader cores | 10,496 | 10,496 |
| GPU compute (FP32) | 51.4 TFLOPS | 41.6 TFLOPS |
| 3DMark Steel Nomad Light | 29,079 | 26,964 |
| Processor | ||
| Processor | Core Ultra 9 275HX | Core Ultra 9 386H |
| CPU maker | Intel | Intel |
| CPU cores | 24 | 16 |
| CPU threads | — | 16 |
| Max CPU clock | 5.4 GHz | 4.9 GHz |
| Processor options | Core Ultra 7 255HX, Core Ultra 9 275HX | Core Ultra 9 386H |
| Geekbench 6 multi-core | — | 17,133 |
| Geekbench 6 single-core | — | 2,952 |
| Cinebench 2024 multi-core | — | 1,283 |
| Display | ||
| Screen size | 16″ | 16″ |
| Resolution | 2560 × 1600 | 2880 × 1800 |
| Resolution class | QHD (1440p/1600p) | 3K (1800p/2000p) |
| Refresh rate | 240 Hz | 120 Hz |
| Panel type | Mini-LED | OLED |
| Brightness | 1,200 nits | 500 nits |
| sRGB coverage | 100% | 100% |
| Response time | 3 ms | 1 ms |
| DCI-P3 coverage | 100% | 100% |
| Pixel density | 189 ppi | 212 ppi |
| Aspect ratio | 16:10 | 16:10 |
| G-Sync / FreeSync | Yes | Yes |
| Advanced Optimus | No | No |
| MUX switch | Yes | Yes |
| HDR | Yes | Yes |
| Touchscreen | Yes | Yes |
| Memory & storage | ||
| RAM (up to) | 64 GB | 64 GB |
| RAM (base) | 64 GB | 16 GB |
| RAM type | DDR5 | LPDDR5X |
| RAM speed | 5,600 MHz | 8,533 MHz |
| Max. supported RAM | 64 GB | 64 GB |
| RAM slots | 2 | — |
| Upgradable RAM | Yes | No |
| SSD (up to) | 1,000 GB | 4,096 GB |
| SSD (base) | 1,000 GB | 1,024 GB |
| M.2 SSD slots | 2 | 2 |
| SSD interface | PCIe 4.0 x4 | PCIe 5.0 x4 |
| Battery & power | ||
| Battery capacity | 90 Wh | 90 Wh |
| Power adapter | 380 W | 250 W |
| USB-C charging (Power Delivery) | Yes | Yes |
| USB-C charging power | 100 W | 100 W |
| Design & cooling | ||
| Weight | 2.8 kg | 2.82 kg |
| Thickness | 31 mm | 24.9 mm |
| Width | 354 mm | 355 mm |
| Depth | 268 mm | 246 mm |
| Body material | Aluminium, Plastic | Aluminium |
| Colours | Black | Gray |
| Cooling fans | 3 | 2 |
| Vapor chamber cooling | Yes | Yes |
| Liquid metal (CPU) | No | No |
| Fan noise (max. load) | 57.2 dB | 54.1 dB |
| Ports & wireless | ||
| Thunderbolt / USB4 | Thunderbolt 5 | Thunderbolt 4 |
| Thunderbolt or USB4 | Yes | Yes |
| USB-C ports | 2 | 2 |
| USB-A ports | 3 | 2 |
| HDMI | HDMI 2.1 | HDMI 2.1 |
| HDMI 2.1 | Yes | Yes |
| (Mini) DisplayPort | No | No |
| Ethernet | 5 Gbit/s | — |
| Ethernet port | Yes | No |
| SD card reader | No | Yes |
| 3.5 mm audio jack | Yes | Yes |
| Wi-Fi standard | Wi-Fi 7 | Wi-Fi 7 |
| Bluetooth | 5.4 | 6 |
| Keyboard & camera | ||
| Keyboard backlight | — | Single-colour RGB |
| Backlit keyboard | Yes | Yes |
| Numeric keypad | No | No |
| 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 | 4 speakers | 2.4 |
| Dolby Atmos | Yes | Yes |
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