Performance comparison: which is faster?
Radeon RX 6900 XT (AMD, 2020) and Radeon RX 7700 XT (AMD, 2023) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: RX 6900 XT is about 20% faster
For generative AI, the higher-VRAM RX 6900 XT（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 | RX 6900 XT | RX 7700 XT |
|---|---|---|
| Performance Score | 24,000 | 20,000 |
| VRAM | 16GB | 12GB |
| Manufacturer | AMD | AMD |
| Series | RX 6000 | RX 7000 |
| Release Year | 2020 | 2023 |
| Compatible CPU Example | Ryzen 9 5900X | Core i7-9700 |
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 6900 XT also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | RX 6900 XT |
| Run larger generative AI and LLM models | RX 6900 XT |
| Prioritize value and adequate performance | RX 7700 XT (the lower model is often sufficient) |
RX 6900 XT is about 20% higher by score (RX 6900 XT: 24000 points / RX 7700 XT: 20000 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 6900 XT has 16GB of VRAM, while RX 7700 XT has 12GB; RX 6900 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 9 5900X pairs well with RX 6900 XT and Core i7-9700 with RX 7700 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.
