Comparison of Mobility Radeon HD 4860 and Radeon R5 A255 [S]ave
| Attribute |  Mobility Radeon HD 4860 × |  Radeon R5 A255 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2009 | 2015 |
| GPU brand | ATI | AMD |
| GPU name | M97 | Topaz |
| Market | Laptop | - |
| Clock speed (MHz) | 650 | 925 |
| Turbo clock speed (MHz) | - | 940 |
| Is dual GPU | - | - |
| Model | Mobility Radeon HD 4860 | Radeon R5 A255 |
| Memory | ||
| Memory (MB) | 1,024 | 1,024 |
| Memory bandwidth (GB/s) | 64 | 64 |
| Memory bus (bit) | 128 | 128 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 1,000 | 1,000 |
| Effective memory clock speed (MHz) | 4,000 | 4,000 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 10.4 | 7.4 |
| Render output processors | 16 | 8 |
| Texture mapping units | 32 | 24 |
| Shading units | 640 | 384 |
| Floating-point performance (GFLOPS) | 832 | 710 |
| Compute units | 8 | 6 |
| Texture rate (GTexel/s) | 20.8 | 22.2 |
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