Performance comparison: which is faster?
GeForce RTX 4090 Laptop GPU (NVIDIA, 2023) and GeForce RTX 3080 (NVIDIA, 2020) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: RTX 4090 Laptop GPU is about 10.2% faster
For generative AI, the higher-VRAM RTX 4090 Laptop GPU（16GB） has the advantage. For gaming, prioritize performance score and CPU compatibility; for AI, prioritize VRAM.
Relative performance score (higher is faster). Actual fps varies by resolution, game, and CPU configuration.
| Item | RTX 4090 Laptop GPU | RTX 3080 |
|---|---|---|
| Performance Score | 27,000 | 24,500 |
| VRAM | 16GB | 10GB |
| Manufacturer | NVIDIA | NVIDIA |
| Series | RTX 40 | RTX 30 |
| Release Year | 2023 | 2020 |
| Compatible CPU Example | Core i7-14700HX | Ryzen 5 8600G |
These generative AI models can run on only one GPU because of the VRAM difference (Stable Diffusion, Flux, LLMs, and others).
— None (all models that run on RTX 4090 Laptop GPU also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | RTX 4090 Laptop GPU |
| Run larger generative AI and LLM models | RTX 4090 Laptop GPU |
| Prioritize value and adequate performance | RTX 3080 (the lower model is often sufficient) |
RTX 4090 Laptop GPU is about 10.2% higher by score (RTX 4090 Laptop GPU: 27000 points / RTX 3080: 24500 points). Actual fps also varies by resolution, game, and CPU, so price is a reasonable deciding factor when the gap is only a few percent.
RTX 4090 Laptop GPU has 16GB of VRAM, while RTX 3080 has 10GB; RTX 4090 Laptop GPU has more. If image generation or a local LLM is even a possibility, the higher-VRAM option provides more room.
Using our guideline, Core i7-14700HX pairs well with RTX 4090 Laptop GPU and Ryzen 5 8600G with RTX 3080 (CPU:GPU ≈ 0.9:1). If the CPU is too weak, replacing the GPU may not raise fps, so check the combination before buying.
→ RTX 4090 Laptop GPU Details ／ RTX 3080 Details ／ Compare Another Combination
