Comparison of MSI GeForce GTX 660 and GeForce GTX 680 Mac [S]ave
| Attribute |  GeForce GTX 680 Mac × |  MSI GeForce GTX 660 × |
|---|---|---|
| GPU | ||
| Release year (year) | 2013 | 2012 |
| Reference card | Nvidia GeForce GTX 680 Mac Edition 1 GHz 2 GB | Nvidia GeForce GTX 660 980 MHz 2 GB |
| GPU brand | Nvidia | Nvidia |
| GPU name | GK104 | GK106 |
| Market | Desktop | Desktop |
| Clock speed (MHz) | 1,006 | 1,032 |
| Turbo clock speed (MHz) | 1,058 | 1,098 |
| Is dual GPU | - | - |
| Model | GeForce GTX 680 Mac | MSI GeForce GTX 660 |
| Memory | ||
| Memory (MB) | 2,048 | 2,048 |
| Memory bandwidth (GB/s) | 192.3 | 144.2 |
| Memory bus (bit) | 256 | 192 |
| Memory type | GDDR5 | GDDR5 |
| Memory clock speed (MHz) | 1,502 | 1,502 |
| Effective memory clock speed (MHz) | 6,008 | 6,008 |
| Noise and power | ||
| TDP (W) | 195 | 140 |
| Raw performance | ||
| Pixel rate (GPixel/s) | 32.2 | 20.64 |
| SMX units | 8 | 5 |
| Render output processors | 32 | 24 |
| Texture mapping units | 128 | 80 |
| Shading units | 1,536 | 960 |
| Floating-point performance (GFLOPS) | 3,090 | 1,981 |
| Texture rate (GTexel/s) | 128.8 | 82.6 |
| Benchmarks | ||
| Metro: Last Light | - | 50 |
| FarCry 3 | - | 80 |
| Battlefield 3 | - | 50 |
| Bioshock Infinite | - | 57 |
| Cloud Gate Factor | - | 19.42 |
| Sky Diver Factor | - | 306.05 |
| Thief | - | 55 |
| Fire Strike Factor | - | 44.27 |
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