Performance comparison: which is faster?
Radeon RX 6600 XT (AMD, 2021) and Radeon RX 5600 XT (AMD, 2020) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: RX 6600 XT is about 20% faster
For generative AI, the higher-VRAM RX 6600 XT（8GB） 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 | RX 6600 XT | RX 5600 XT |
|---|---|---|
| Performance Score | 15,000 | 12,500 |
| VRAM | 8GB | 6GB |
| Manufacturer | AMD | AMD |
| Series | RX 6000 | RX 5000 |
| Release Year | 2021 | 2020 |
| Compatible CPU Example | Ryzen 7 1800X | Ryzen 5 1400 |
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 RX 6600 XT also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | RX 6600 XT |
| Run larger generative AI and LLM models | RX 6600 XT |
| Prioritize value and adequate performance | RX 5600 XT (the lower model is often sufficient) |
RX 6600 XT is about 20% higher by score (RX 6600 XT: 15000 points / RX 5600 XT: 12500 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.
RX 6600 XT has 8GB of VRAM, while RX 5600 XT has 6GB; RX 6600 XT has more. If image generation or a local LLM is even a possibility, the higher-VRAM option provides more room.
Using our guideline, Ryzen 7 1800X pairs well with RX 6600 XT and Ryzen 5 1400 with RX 5600 XT (CPU:GPU ≈ 0.9:1). If the CPU is too weak, replacing the GPU may not raise fps, so check the combination before buying.
