Comparison of Radeon HD 3870 Mac and GeForce GTX 275 PhysX [S]ave
| Attribute |  GeForce GTX 275 PhysX × |  Radeon HD 3870 Mac × |
|---|---|---|
| GPU | ||
| Release year (year) | 2010 | 2008 |
| GPU brand | Nvidia | ATI |
| GPU name | GT200 B3 | RV670 |
| Market | Desktop | Desktop |
| Clock speed (MHz) | 633 | 777 |
| Is dual GPU | - | - |
| Model | GeForce GTX 275 PhysX | Radeon HD 3870 Mac |
| Memory | ||
| Memory (MB) | 896 | 512 |
| Memory bandwidth (GB/s) | 127 | 72.1 |
| Memory bus (bit) | 448 | 256 |
| Memory type | GDDR3 | GDDR4 |
| Memory clock speed (MHz) | 1,134 | 1,126 |
| Effective memory clock speed (MHz) | 2,268 | 2,252 |
| Noise and power | ||
| TDP (W) | 219 | 106 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 17.72 | 12.43 |
| Render output processors | 28 | 16 |
| Texture mapping units | 80 | 16 |
| Shading units | 240 | 320 |
| Floating-point performance (GFLOPS) | 622 | 497 |
| Compute units | - | 4 |
| Texture rate (GTexel/s) | 50.64 | 12.43 |
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