Comparison of Radeon R9 280X and Radeon R9 M390X [S]ave
| Attribute |  Radeon R9 280X × |  Radeon R9 M390X × |
|---|---|---|
| GPU | ||
| Release year (year) | 2013 | 2015 |
| Reference card | AMD Radeon R9 280X 850 MHz 3 GB | - |
| GPU brand | AMD | AMD |
| GPU name | Tahiti | Amethyst |
| Market | Desktop | Laptop |
| Clock speed (MHz) | 850 | 723 |
| Turbo clock speed (MHz) | 1,000 | 950 |
| Is dual GPU | - | - |
| Model | Radeon R9 280X | Radeon R9 M390X |
| Memory | ||
| Memory (MB) | 3,072 | 4,096 |
| Memory bandwidth (GB/s) | 288 | 160 |
| Memory bus (bit) | 384 | 256 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 1,500 | 1,250 |
| Effective memory clock speed (MHz) | 6,000 | 5,000 |
| Noise and power | ||
| TDP (W) | 250 | 100 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 32 | 23.14 |
| Render output processors | 32 | 32 |
| Texture mapping units | 128 | 128 |
| Shading units | 2,048 | 2,048 |
| Floating-point performance (GFLOPS) | 4,096 | 2,961 |
| Compute units | 32 | 32 |
| Texture rate (GTexel/s) | 128 | 92.5 |
| Benchmarks | ||
| Cloud Gate Factor | - | 23.65 |
| Battlefield 4 | 39.9 | 63.65 |
| Face detection (mPixels/s) | 95.62 | 44.39 |
| T-Rex (GFXBench 3.0) | 3356.04 | 3356.44 |
| Manhattan (GFXBench 3.0) | 3709.16 | 3384.91 |
| Bitcoin mining (mHash/s) | 468.39 | 241.5 |
| Sky Diver Factor | 380.99 | 317.44 |
| Thief | 33.6 | 35 |
| Fire Strike Factor | 62.73 | - |
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