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Differences What are the advantages of each

Front view of GeForce GTX 880M

Reasons to consider the
Nvidia GeForce GTX 880M

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Much more memory 8,192 MB vs 512 MB 16x more memory
Significantly better floating-point performance 2,930.7 GFLOPS vs 729.6 GFLOPS More than 4x better floating-point performance
Higher memory bandwidth 160 GB/s vs 80 GB/s 2x higher memory bandwidth
Significantly higher texture rate 122.1 GTexel/s vs 30.4 GTexel/s More than 4x higher texture rate
Many more texture mapping units 128 vs 32 96 more texture mapping units
Higher pixel rate 30.53 GPixel/s vs 7.6 GPixel/s More than 4x higher pixel rate
Significantly more shading units 1,536 vs 384 1152 more shading units
Significantly better face detection score 41.2 mPixels/s vs 11.24 mPixels/s Around 3.8x better face detection score
More render output processors 32 vs 16 Twice as many render output processors
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
Front view of GeForce GTX 660M Mac

Reasons to consider the
Nvidia GeForce GTX 660M Mac

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Significantly lower TDP 50W vs 122W 2.4x lower TDP

Benchmarks Real world tests of GeForce GTX 880M vs 660M Mac

Bitcoin mining Data courtesy CompuBench

GeForce GTX 880M
82.51 mHash/s
GeForce GTX 660M Mac
16.56 mHash/s

Face detection Data courtesy CompuBench

GeForce GTX 880M
41.2 mPixels/s
GeForce GTX 660M Mac
11.24 mPixels/s

Ocean surface simulation Data courtesy CompuBench

GeForce GTX 880M
1,215.86 frames/s
GeForce GTX 660M Mac
301.55 frames/s

Particle simulation Data courtesy CompuBench

GeForce GTX 880M
384.1 mInteraction/s
GeForce GTX 660M Mac
123.43 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

GeForce GTX 880M
3.57 frames/s
GeForce GTX 660M Mac
0.78 frames/s

Video composition Data courtesy CompuBench

GeForce GTX 880M
71.25 frames/s
GeForce GTX 660M Mac
16.08 frames/s

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