Comparison of AMD Radeon HD 6850 X2 and NVIDIA Tesla K20s [S]ave
| Attribute |  AMD Radeon HD 6850 X2 × |  NVIDIA Tesla K20s × |
|---|---|---|
| GPU | ||
| Release year (year) | 2011 | 2013 |
| GPU brand | AMD | Nvidia |
| GPU name | Barts PRO | GK110 |
| Market | Desktop | - |
| Clock speed (MHz) | 800 | 706 |
| Is dual GPU | + | - |
| Model | AMD Radeon HD 6850 X2 | NVIDIA Tesla K20s |
| Memory | ||
| Memory (MB) | 4,096 | 5,120 |
| Memory bandwidth (GB/s) | 268.8 | 208 |
| Memory bus (bit) | 512 | 320 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 1,050 | 1,300 |
| Effective memory clock speed (MHz) | 4,200 | 5,200 |
| Noise and power | ||
| TDP (W) | 254 | 225 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 51.2 | 36.7 |
| Render output processors | 64 | 40 |
| Texture mapping units | 96 | 208 |
| Shading units | 1,920 | 2,496 |
| Floating-point performance (GFLOPS) | 3,072 | 3,524 |
| Compute units | 24 | - |
| Texture rate (GTexel/s) | 76.8 | 146.8 |
| Benchmarks | ||
| PassMark | 2,534 | - |
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