Performance comparison: which is faster?
Radeon HD 6870 (AMD, 2011) and Radeon HD 7790 (AMD, 2012) are compared here. Compare scores and VRAM, generative AI usability, and CPUs that pair well with each GPU.
Overall performance: HD 6870 is about 6.7% faster
Both have 1GB of VRAM, so they support a similar range of generative AI models. 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 | HD 6870 | HD 7790 |
|---|---|---|
| Performance Score | 3,200 | 3,000 |
| VRAM | 1GB | 1GB |
| Manufacturer | AMD | AMD |
| Series | HD 6000 | HD 7000 |
| Release Year | 2011 | 2012 |
| Compatible CPU Example | Core 2 Quad Q9550 | AMD Phenom II X2 560 |
| If You Want To... | Recommended |
|---|---|
| Prioritize high fps and smooth performance in demanding games | HD 6870 |
| Run larger generative AI and LLM models | HD 6870 |
| Prioritize value and adequate performance | HD 7790 (the lower model is often sufficient) |
HD 6870 is about 6.7% higher by score (HD 6870: 3200 points / HD 7790: 3000 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.
Both have 1GB of VRAM, so the range of generative AI models they can run is nearly the same.
Using our guideline, Core 2 Quad Q9550 pairs well with HD 6870 and AMD Phenom II X2 560 with HD 7790 (CPU:GPU ≈ 0.9:1). If the CPU is too weak, replacing the GPU may not raise fps, so check the combination before buying.
→ HD 6870 Details ／ HD 7790 Details ／ Compare Another Combination
