Attribute | GeForce GT 650M Mac × | GeForce GT 640M Mac × |
---|---|---|
GPU | ||
Release year (year) | 2012 | 2013 |
GPU brand | Nvidia | Nvidia |
GPU name | GK107 | GK107 |
Market | Laptop | Laptop |
Clock speed (MHz) | 900 | 745 |
Is dual GPU | - | - |
Model | GeForce GT 650M Mac | GeForce GT 640M Mac |
Memory | ||
Memory (MB) | 512 | 512 |
Memory bandwidth (GB/s) | 80.3 | 40 |
Memory bus (bit) | 128 | 64 |
Memory type | GDDR5 | GDDR5 |
Memory clock speed (MHz) | 1,254 | 1,250 |
Effective memory clock speed (MHz) | 5,016 | 5,000 |
Noise and power | ||
TDP (W) | 45 | 32 |
Raw performance | ||
Pixel rate (GPixel/s) | 7.2 | 5.96 |
Render output processors | 16 | 8 |
Texture mapping units | 32 | 32 |
Shading units | 384 | 384 |
Floating-point performance (GFLOPS) | 691 | 572 |
Texture rate (GTexel/s) | 28.8 | 23.84 |
Benchmarks | ||
Particle simulation (mInteraction/s) | 87.07 | 69.88 |
T-Rex (Compubench 1.5) (frames/s) | 0.81 | 0.56 |
Video composition (frames/s) | 14.41 | 11.95 |
Face detection (mPixels/s) | 8.63 | 6.58 |
T-Rex (GFXBench 3.0) | 2726.54 | 3356.32 |
Manhattan (GFXBench 3.0) | 1706.01 | 2290.86 |
Bitcoin mining (mHash/s) | 13.28 | 12.55 |
Ocean surface simulation (frames/s) | 342.74 | 226.22 |