Performance comparison: which is faster?
Radeon R9 Fury X (AMD, 2015) and Radeon R9 390X (AMD, 2015) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: R9 Fury X is about 13.3% faster
For generative AI, the higher-VRAM R9 390X（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 | R9 Fury X | R9 390X |
|---|---|---|
| Performance Score | 8,500 | 7,500 |
| VRAM | 4GB | 8GB |
| Manufacturer | AMD | AMD |
| Series | R9 | R9 |
| Release Year | 2015 | 2015 |
| Compatible CPU Example | Core i3-9100 | Core i5-3570K |
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 R9 390X also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | R9 Fury X |
| Run larger generative AI and LLM models | R9 390X |
| Prioritize value and adequate performance | R9 390X (the lower model is often sufficient) |
R9 Fury X is about 13.3% higher by score (R9 Fury X: 8500 points / R9 390X: 7500 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.
R9 Fury X has 4GB of VRAM, while R9 390X has 8GB; R9 390X has more. If image generation or a local LLM is even a possibility, the higher-VRAM option provides more room.
Using our guideline, Core i3-9100 pairs well with R9 Fury X and Core i5-3570K with R9 390X (CPU:GPU ≈ 0.9:1). If the CPU is too weak, replacing the GPU may not raise fps, so check the combination before buying.
→ R9 Fury X Details ／ R9 390X Details ／ Compare Another Combination
