Performance comparison: which is faster?
GeForce GTX 580 (NVIDIA, 2011) and GeForce GTX 660 Ti (NVIDIA, 2012) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: GTX 580 is about 12.5% faster
For generative AI, the higher-VRAM GTX 660 Ti（2GB） 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 | GTX 580 | GTX 660 Ti |
|---|---|---|
| Performance Score | 4,500 | 4,000 |
| VRAM | 1.5GB | 2GB |
| Manufacturer | NVIDIA | NVIDIA |
| Series | GTX 500 | GTX 600 |
| Release Year | 2011 | 2012 |
| Compatible CPU Example | AMD FX-4100 | AMD Phenom II X4 945 |
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 GTX 660 Ti also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | GTX 580 |
| Run larger generative AI and LLM models | GTX 660 Ti |
| Prioritize value and adequate performance | GTX 660 Ti (the lower model is often sufficient) |
GTX 580 is about 12.5% higher by score (GTX 580: 4500 points / GTX 660 Ti: 4000 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.
GTX 580 has 1.5GB of VRAM, while GTX 660 Ti has 2GB; GTX 660 Ti has more. If image generation or a local LLM is even a possibility, the higher-VRAM option provides more room.
Using our guideline, AMD FX-4100 pairs well with GTX 580 and AMD Phenom II X4 945 with GTX 660 Ti (CPU:GPU ≈ 0.9:1). If the CPU is too weak, replacing the GPU may not raise fps, so check the combination before buying.
→ GTX 580 Details ／ GTX 660 Ti Details ／ Compare Another Combination
