Performance comparison: which is faster?
Radeon R9 280 (AMD, 2014) and Radeon HD 7870 (AMD, 2012) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: R9 280 is about 7.1% faster
For generative AI, the higher-VRAM R9 280（3GB） 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 280 | HD 7870 |
|---|---|---|
| Performance Score | 4,500 | 4,200 |
| VRAM | 3GB | 2GB |
| Manufacturer | AMD | AMD |
| Series | R9 | HD 7000 |
| Release Year | 2014 | 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 R9 280 also run here)
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | R9 280 |
| Run larger generative AI and LLM models | R9 280 |
| Prioritize value and adequate performance | HD 7870 (the lower model is often sufficient) |
R9 280 is about 7.1% higher by score (R9 280: 4500 points / HD 7870: 4200 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 280 has 3GB of VRAM, while HD 7870 has 2GB; R9 280 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 R9 280 and AMD Phenom II X4 945 with HD 7870 (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 280 Details ／ HD 7870 Details ／ Compare Another Combination
