Comparison of Radeon HD 8950 and Radeon HD 6850 X2 [S]ave
| Attribute |  Radeon HD 8950 × |  Radeon HD 6850 X2 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2013 | 2011 |
| Reference card | - | AMD Radeon HD 6850 X2 800 MHz 4 GB |
| GPU brand | AMD | AMD |
| GPU name | Curaçao PRO | Barts PRO |
| Market | Desktop | Desktop |
| Clock speed (MHz) | 900 | 800 |
| Is dual GPU | - | + |
| Model | Radeon HD 8950 | Radeon HD 6850 X2 |
| Memory | ||
| Memory (MB) | 3,072 | 4,096 |
| Memory bandwidth (GB/s) | 240 | 268.8 |
| Memory bus (bit) | 384 | 512 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 1,250 | 1,050 |
| Effective memory clock speed (MHz) | 5,000 | 4,200 |
| Noise and power | ||
| TDP (W) | - | 254 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 43.2 | 51.2 |
| Render output processors | 48 | 64 |
| Texture mapping units | 144 | 96 |
| Shading units | 2,304 | 1,920 |
| Floating-point performance (GFLOPS) | 4,147 | 3,072 |
| Compute units | 36 | 24 |
| Texture rate (GTexel/s) | 129.6 | 76.8 |
| Benchmarks | ||
| Particle simulation (mInteraction/s) | 321.98 | - |
| T-Rex (Compubench 1.5) (frames/s) | 3.33 | - |
| Video composition (frames/s) | 64.21 | - |
| PassMark | 3,120 | 2,534 |
| PassMark Direct Compute | 1,741 | - |
| Face detection (mPixels/s) | 40.31 | - |
| Bitcoin mining (mHash/s) | 181.51 | - |
| Ocean surface simulation (frames/s) | 795.33 | - |
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