Comparison of Radeon R9 M290X and Radeon R9 M390X [S]ave
| Attribute |  Radeon R9 M390X × |  Radeon R9 M290X × |
|---|---|---|
| GPU | ||
| Release year (year) | 2015 | 2014 |
| GPU brand | AMD | AMD |
| GPU name | Amethyst | Neptune |
| Market | Laptop | Laptop |
| Clock speed (MHz) | 723 | 850 |
| Turbo clock speed (MHz) | 950 | 900 |
| Is dual GPU | - | - |
| Model | Radeon R9 M390X | Radeon R9 M290X |
| Memory | ||
| Memory (MB) | 4,096 | 4,096 |
| Memory bandwidth (GB/s) | 160 | 153.6 |
| Memory bus (bit) | 256 | 256 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 1,250 | 1,200 |
| Effective memory clock speed (MHz) | 5,000 | 4,800 |
| Noise and power | ||
| TDP (W) | 100 | 100 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 23.14 | 28.8 |
| Render output processors | 32 | 32 |
| Texture mapping units | 128 | 80 |
| Shading units | 2,048 | 1,280 |
| Floating-point performance (GFLOPS) | 2,961 | 2,304 |
| Compute units | 32 | 20 |
| Texture rate (GTexel/s) | 92.5 | 72 |
| Benchmarks | ||
| Bioshock Infinite | - | 46.8 |
| Cloud Gate Factor | 23.65 | - |
| Battlefield 4 | 63.65 | 36.35 |
| Face detection (mPixels/s) | 44.39 | 54.52 |
| T-Rex (GFXBench 3.0) | 3356.44 | 3324.52 |
| Manhattan (GFXBench 3.0) | 3384.91 | 2047.22 |
| Bitcoin mining (mHash/s) | 241.5 | 258.05 |
| Sky Diver Factor | 317.44 | - |
| Thief | 35 | 34 |
| Ocean surface simulation (frames/s) | - | 1134.46 |
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