Comparison of Mobility Radeon HD 4830 and Mobility Radeon HD 4870 [S]ave
| Attribute |  Mobility Radeon HD 4870 × |  Mobility Radeon HD 4830 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2009 | 2009 |
| Reference card | ATi Mobility Radeon HD 4870 550 MHz 512 MB | - |
| GPU brand | ATI | ATI |
| GPU name | M98 | M97 |
| Market | Laptop | Laptop |
| Clock speed (MHz) | 550 | 550 |
| Is dual GPU | - | - |
| Model | Mobility Radeon HD 4870 | Mobility Radeon HD 4830 |
| Memory | ||
| Memory (MB) | 1,024 | 1,024 |
| Memory bandwidth (GB/s) | 89.6 | 44.8 |
| Memory bus (bit) | 256 | 128 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 700 | 700 |
| Effective memory clock speed (MHz) | 2,800 | 2,800 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 8.8 | 8.8 |
| Render output processors | 16 | 16 |
| Texture mapping units | 40 | 32 |
| Shading units | 800 | 640 |
| Floating-point performance (GFLOPS) | 880 | 704 |
| Compute units | 10 | 8 |
| Texture rate (GTexel/s) | 22 | 17.6 |
| Benchmarks | ||
| PassMark | 702 | 514 |
| Cloud Gate Factor | 11.67 | - |
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