Comparison of NVIDIA Quadro P400 and Radeon HD 6400 [S]ave
| Attribute |  NVIDIA Quadro P400 × |  Radeon HD 6400 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2011 | 2012 |
| GPU brand | Nvidia | AMD |
| GPU name | GT216 | Caicos LE |
| Market | - | Desktop |
| Clock speed (MHz) | 450 | 625 |
| Is dual GPU | - | - |
| Model | NVIDIA Quadro P400 | Radeon HD 6400 |
| Memory | ||
| Memory (MB) | 512 | 512 |
| Memory bandwidth (GB/s) | 12.3 | 12.8 |
| Memory bus (bit) | 64 | 64 |
| Memory type | DDR3 | GDDR3 |
| Memory clock speed (MHz) | 770 | 800 |
| Effective memory clock speed (MHz) | 1,540 | 1,600 |
| Noise and power | ||
| TDP (W) | 32 | 18 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 3.6 | 2.5 |
| Render output processors | 8 | 4 |
| Texture mapping units | 16 | 8 |
| Shading units | 48 | 160 |
| Floating-point performance (GFLOPS) | 108 | 200 |
| Compute units | - | 2 |
| Texture rate (GTexel/s) | 7.2 | 5 |
| Benchmarks | ||
| Particle simulation (mInteraction/s) | 279.06 | - |
| T-Rex (Compubench 1.5) (frames/s) | 1.46 | - |
| Video composition (frames/s) | 25.09 | - |
| Face detection (mPixels/s) | 25.44 | - |
| T-Rex (GFXBench 3.0) | 1704.33 | 1483.8 |
| Manhattan (GFXBench 3.0) | 1181.99 | 803.03 |
| Bitcoin mining (mHash/s) | 87 | - |
| Ocean surface simulation (frames/s) | 339.46 | - |
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