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Differences What are the advantages of each

Front view of GeForce GTX 680MX

Reasons to consider the
Nvidia GeForce GTX 680MX

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Higher memory bandwidth 160 GB/s vs 80 GB/s 2x higher memory bandwidth
Better floating-point performance 2,208.8 GFLOPS vs 833.3 GFLOPS Around 2.8x better floating-point performance
Much higher memory clock speed 2,500 MHz vs 1,250 MHz 2x higher memory clock speed
Many more texture mapping units 128 vs 32 96 more texture mapping units
Higher texture rate 92 GTexel/s vs 34.7 GTexel/s Around 2.8x higher texture rate
More memory 2,048 MB vs 1,024 MB 2x more memory
Significantly more shading units 1,536 vs 384 1152 more shading units
Higher pixel rate 23.01 GPixel/s vs 8.68 GPixel/s Around 2.8x higher pixel rate
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
Better T-Rex score 2.31 frames/s vs 0.97 frames/s Around 2.5x better T-Rex score
Front view of GeForce GT 755M Mac

Reasons to consider the
Nvidia GeForce GT 755M Mac

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Significantly higher clock speed 1,085 MHz vs 719 MHz More than 50% higher clock speed
Significantly lower TDP 50W vs 122W 2.4x lower TDP

Benchmarks Real world tests of GeForce GTX 680MX vs GT 755M Mac

Bitcoin mining Data courtesy CompuBench

GeForce GTX 680MX
56.71 mHash/s
GeForce GT 755M Mac
19.14 mHash/s

Face detection Data courtesy CompuBench

GeForce GTX 680MX
25.42 mPixels/s
GeForce GT 755M Mac
10.24 mPixels/s

Ocean surface simulation Data courtesy CompuBench

GeForce GTX 680MX
734.94 frames/s
GeForce GT 755M Mac
393.81 frames/s

Particle simulation Data courtesy CompuBench

GeForce GTX 680MX
281.97 mInteraction/s
GeForce GT 755M Mac
143 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

GeForce GTX 680MX
2.31 frames/s
GeForce GT 755M Mac
0.97 frames/s

Video composition Data courtesy CompuBench

GeForce GTX 680MX
35.43 frames/s
GeForce GT 755M Mac
18.79 frames/s

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