Asus ROG Zephyrus Duo 16 GX650 RTX 4090 (2023) vs Lenovo Legion Slim 5 Gen 8 16 RTX 4070 (2023)
What ROG Zephyrus Duo 16 GX650 RTX 4090 (2023) does better (23) and where Legion Slim 5 Gen 8 16 RTX 4070 (2023) wins (6) — every spec side by side.
vs
9.7Graphics7.9
9.4Overall performance6.6
9.3Display5.9
5.3Memory & storage4.9
3.6Battery & portability6.9
6.4Features & cooling6.4
Dimensions
Size comparison
ROG Zephyrus Duo 16 GX650 RTX 4090 (2023)Legion Slim 5 Gen 8 16 RTX 4070 (2023)
| ROG Zephyrus Duo 16 GX650 RTX 4090 (2023) | Legion Slim 5 Gen 8 16 RTX 4070 (2023) | Difference | |
|---|---|---|---|
| Depth | 266 mm | 260.3 mm | +5.7 mm |
| Width | 355 mm | 359.7 mm | −4.7 mm |
| Thickness | 30 mm | 25.2 mm | +4.8 mm |
| Weight | 2.7 kg | 2.3 kg | +0.4 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is ROG Zephyrus Duo 16 GX650 RTX 4090 (2023) better than Legion Slim 5 Gen 8 16 RTX 4070 (2023)?
- GPU compute (FP32)45.2 TFLOPS vs 21.8 TFLOPS2.1×
- 3DMark Steel Nomad Light26,424 vs 13,523+95%
- Geekbench 6 multi-core19,038 vs 10,447+82%
- CPU cores16 vs 62.7×
- Cinebench 2024 multi-core1,961 vs 7642.6×
- Brightness1,100 nits vs 300 nits3.7×
- Refresh rate240 Hz vs 144 Hz+67%
- GPU shader cores9,728 vs 4,6082.1×
- GPU power (TGP)175 W vs 140 W+25%
- Video memory16 GB vs 8 GB2×
- Resolution classQHD (1440p/1600p) vs Full HD (1080p/1200p)
- Battery capacity90 Wh vs 80 Wh+12%
Why is Legion Slim 5 Gen 8 16 RTX 4070 (2023) better than ROG Zephyrus Duo 16 GX650 RTX 4090 (2023)?
- Weight2.67 kg vs 2.3 kg+16%
- Thickness30 mm vs 25.2 mm+19%
- Wi-Fi standardWi-Fi 6 vs Wi-Fi 6E+8%
- SSD (up to)2,000 GB vs 2,048 GB+2%
- RAM speed4,800 MHz vs 5,600 MHz+17%
- Fan noise (max. load)56 dB vs 53.9 dB+4%
Specifications
Side by side
| Graphics | ||
| Graphics card | GeForce RTX 4090 Laptop | GeForce RTX 4070 Laptop |
| GPU maker | NVIDIA | NVIDIA |
| GPU power (TGP) | 175 W | 140 W |
| Video memory | 16 GB | 8 GB |
| Video memory type | GDDR6 | GDDR6 |
| GPU shader cores | 9,728 | 4,608 |
| GPU compute (FP32) | 45.2 TFLOPS | 21.8 TFLOPS |
| 3DMark Steel Nomad Light | 26,424 | 13,523 |
| Processor | ||
| Processor | Ryzen 9 7945HX | Ryzen 5 7640HS |
| CPU maker | AMD | AMD |
| CPU cores | 16 | 6 |
| CPU threads | 32 | 12 |
| Max CPU clock | 5.4 GHz | 5 GHz |
| Processor options | Ryzen 9 7945HX | Ryzen 5 7640HS, Ryzen 7 7840HS |
| Geekbench 6 multi-core | 19,038 | 10,447 |
| Geekbench 6 single-core | 3,105 | 2,528 |
| Cinebench 2024 multi-core | 1,961 | 764 |
| Display | ||
| Screen size | 16″ | 16″ |
| Resolution | 2560 × 1600 | 1920 × 1200 |
| Resolution class | QHD (1440p/1600p) | Full HD (1080p/1200p) |
| Refresh rate | 240 Hz | 144 Hz |
| Panel type | IPS | IPS |
| Brightness | 1,100 nits | 300 nits |
| sRGB coverage | 100% | — |
| Response time | 3 ms | — |
| DCI-P3 coverage | 99% | — |
| Pixel density | 189 ppi | 142 ppi |
| Aspect ratio | 16:10 | 16:10 |
| G-Sync / FreeSync | Yes | Yes |
| Advanced Optimus | No | No |
| MUX switch | Yes | Yes |
| HDR | Yes | No |
| Touchscreen | No | No |
| Memory & storage | ||
| RAM (up to) | 32 GB | 32 GB |
| RAM (base) | 32 GB | 8 GB |
| RAM type | DDR5 | DDR5 |
| RAM speed | 4,800 MHz | 5,600 MHz |
| Max. supported RAM | 64 GB | 32 GB |
| RAM slots | 2 | 2 |
| Upgradable RAM | Yes | Yes |
| SSD (up to) | 2,000 GB | 2,048 GB |
| SSD (base) | 2,000 GB | 512 GB |
| M.2 SSD slots | 2 | 2 |
| SSD interface | PCIe 4.0 x4 | PCIe 4.0 x4 |
| Battery & power | ||
| Battery capacity | 90 Wh | 80 Wh |
| Power adapter | 330 W | 230 W |
| USB-C charging (Power Delivery) | Yes | Yes |
| Design & cooling | ||
| Weight | 2.67 kg | 2.3 kg |
| Thickness | 30 mm | 25.2 mm |
| Width | 355 mm | 359.7 mm |
| Depth | 266 mm | 260.3 mm |
| Body material | Aluminium | Aluminium, Plastic |
| Colours | Black | Gray |
| Cooling fans | 2 | 2 |
| Vapor chamber cooling | No | No |
| Liquid metal (CPU) | Yes | No |
| Fan noise (max. load) | 56 dB | 53.9 dB |
| Ports & wireless | ||
| Thunderbolt or USB4 | No | No |
| USB-C ports | 2 | 2 |
| USB-A ports | 2 | 2 |
| HDMI | HDMI 2.1 | HDMI 2.1 |
| HDMI 2.1 | Yes | Yes |
| (Mini) DisplayPort | No | No |
| Ethernet | 5 Gbit/s | — |
| Ethernet port | Yes | Yes |
| SD card reader | Yes | Yes |
| 3.5 mm audio jack | Yes | Yes |
| Wi-Fi standard | Wi-Fi 6 | Wi-Fi 6E |
| Bluetooth | 5.2 | 5.2 |
| Keyboard & camera | ||
| Backlit keyboard | Yes | Yes |
| Numeric keypad | Yes | Yes |
| Key travel | 1.7 mm | 1.5 mm |
| Webcam | 1,080p | 1,080p |
| IR camera (face login) | No | No |
| Fingerprint reader | Yes | No |
| Audio | ||
| Speakers | 6 speakers | 2.0 |
| Dolby Atmos | Yes | No |
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