Comparison of Radeon HD 8490 and GeForce GT 420 [S]ave
| Attribute |  Radeon HD 8490 × |  GeForce GT 420 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2013 | 2010 |
| GPU brand | AMD | Nvidia |
| GPU name | Caicos XTX | GF108 |
| Market | Desktop | Desktop |
| Clock speed (MHz) | 875 | 700 |
| Is dual GPU | - | - |
| Model | Radeon HD 8490 | GeForce GT 420 |
| Memory | ||
| Memory (MB) | 1,024 | 1,048 |
| Memory bandwidth (GB/s) | 14.4 | 28.8 |
| Memory bus (bit) | 64 | 128 |
| Memory type | DDR3 | DDR3 |
| Memory clock speed (MHz) | 900 | 900 |
| Effective memory clock speed (MHz) | 1,800 | 1,800 |
| Noise and power | ||
| TDP (W) | 35 | 50 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 3.5 | 1.4 |
| Render output processors | 4 | 4 |
| Texture mapping units | 8 | 4 |
| Shading units | 160 | 48 |
| Floating-point performance (GFLOPS) | 280 | 134 |
| Compute units | 2 | - |
| Texture rate (GTexel/s) | 7 | 2.8 |
| Benchmarks | ||
| Particle simulation (mInteraction/s) | - | 26.67 |
| Cloud Gate Factor | 6.58 | 7.08 |
| Face detection (mPixels/s) | 2.02 | 3.19 |
| T-Rex (GFXBench 3.0) | 1776.24 | 1648.79 |
| Manhattan (GFXBench 3.0) | 1074.06 | 1181.01 |
| Bitcoin mining (mHash/s) | 13.08 | - |
| Sky Diver Factor | 36.55 | 40.32 |
| Fire Strike Factor | 4.53 | 4.17 |
| Ocean surface simulation (frames/s) | 126.59 | 104.11 |
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