Performance comparison: which is faster?
NVIDIA H100 PCIe (NVIDIA, 2023) and GeForce RTX 5080 (NVIDIA, 2025) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: H100 PCIe is about 80.6% faster
For generative AI, the higher-VRAM H100 PCIe（80GB） 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 | H100 PCIe | RTX 5080 |
|---|---|---|
| Performance Score | 65,000 | 36,000 |
| VRAM | 80GB | 16GB |
| Manufacturer | NVIDIA | NVIDIA |
| Series | Datacenter | RTX 50 |
| Release Year | 2023 | 2025 |
| Compatible CPU Example | Ryzen 9 9950X3D | Ryzen 9 9950X3D |
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 H100 PCIe also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | H100 PCIe |
| Run larger generative AI and LLM models | H100 PCIe |
| Prioritize value and adequate performance | RTX 5080 (the lower model is often sufficient) |
H100 PCIe is about 80.6% higher by score (H100 PCIe: 65000 points / RTX 5080: 36000 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.
H100 PCIe has 80GB of VRAM, while RTX 5080 has 16GB; H100 PCIe has more. If image generation or a local LLM is even a possibility, the higher-VRAM option provides more room.
Using our guideline, Ryzen 9 9950X3D pairs well with H100 PCIe and Ryzen 9 9950X3D with RTX 5080 (CPU:GPU ≈ 0.9:1). If the CPU is too weak, replacing the GPU may not raise fps, so check the combination before buying.
