Comparison of GeForce 920M and GeForce GT 640M [S]ave
| Attribute |  GeForce 920M × |  GeForce GT 640M × |
|---|---|---|
| GPU | ||
| Release year (year) | 2015 | 2012 |
| Reference card | Nvidia GeForce 920M 775 MHz 1 GB | - |
| GPU brand | Nvidia | Nvidia |
| GPU name | GK208 | GK107 |
| Market | Laptop | Laptop |
| Clock speed (MHz) | 954 | 625 |
| Is dual GPU | - | - |
| Model | GeForce 920M | GeForce GT 640M |
| Memory | ||
| Memory (MB) | 2,048 | 2,048 |
| 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) | 33 | 32 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 7.63 | 5 |
| Render output processors | 16 | 16 |
| Texture mapping units | 32 | 32 |
| Shading units | 384 | 384 |
| Floating-point performance (GFLOPS) | 733 | 480 |
| Texture rate (GTexel/s) | 30.53 | 20 |
| Benchmarks | ||
| Battlefield 4 | 9.6 | 9.9 |
| Face detection (mPixels/s) | 8.36 | 7.86 |
| T-Rex (GFXBench 3.0) | 3358.92 | 3339.75 |
| Manhattan (GFXBench 3.0) | 3685.69 | 3590.88 |
| Bitcoin mining (mHash/s) | 40.41 | 17.38 |
| Sky Diver Factor | 102.8 | 106.74 |
| Thief | 5.95 | 8.35 |
| Fire Strike Factor | 10.41 | 11.26 |
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