Comparison of Mobility Radeon HD 3870 X2 and Mobility Radeon HD 3850 X2 [S]ave
| Attribute |  Mobility Radeon HD 3870 X2 × | Mobility Radeon HD 3850 X2 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2008 | 2008 |
| GPU brand | ATI | ATI |
| GPU name | M88 | M88 |
| Market | Laptop | Laptop |
| Clock speed (MHz) | 660 | 580 |
| Is dual GPU | + | + |
| Model | Mobility Radeon HD 3870 X2 | Mobility Radeon HD 3850 X2 |
| Memory | ||
| Memory (MB) | 1,024 | 1,024 |
| Memory bandwidth (GB/s) | 108.8 | 96 |
| Memory bus (bit) | 512 | 512 |
| Memory type | GDDR3 | GDDR3 |
| Memory clock speed (MHz) | 850 | 750 |
| Effective memory clock speed (MHz) | 1,700 | 1,500 |
| Noise and power | ||
| TDP (W) | 110 | 70 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 21.12 | 18.56 |
| Render output processors | 32 | 32 |
| Texture mapping units | 32 | 32 |
| Shading units | 640 | 640 |
| Floating-point performance (GFLOPS) | 845 | 742 |
| Compute units | 8 | 8 |
| Texture rate (GTexel/s) | 21.12 | 18.56 |
| Benchmarks | ||
| PassMark | 563 | - |
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