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Differences What are the advantages of each

Front view of GeForce GTX 980M

Reasons to consider the
Nvidia GeForce GTX 980M

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Much more memory 8,192 MB vs 2,048 MB 4x more memory
Much higher memory bandwidth 160.4 GB/s vs 14.4 GB/s Around 11.2x higher memory bandwidth
Much higher pixel rate 66.4 GPixel/s vs 8.58 GPixel/s Around 7.8x higher pixel rate
Significantly higher effective memory clock speed 5,012 MHz vs 1,800 MHz More than 2.8x higher effective memory clock speed
Significantly better floating-point performance 3,189 GFLOPS vs 823.3 GFLOPS More than 3.8x better floating-point performance
Significantly higher texture rate 99.6 GTexel/s vs 25.73 GTexel/s More than 3.8x higher texture rate
Many more render output processors 64 vs 8 56 more render output processors
Significantly more shading units 1,536 vs 384 1152 more shading units
Significantly more texture mapping units 96 vs 24 72 more texture mapping units
Much wider memory bus 256 bit vs 64 bit 4x wider memory bus
Significantly better ocean surface simulation score 1,138.49 frames/s vs 381.9 frames/s Around 3x better ocean surface simulation score
Significantly higher memory clock speed 1,253 MHz vs 900 MHz Around 40% higher memory clock speed
Front view of GeForce 945A

Reasons to consider the
Nvidia GeForce 945A

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Slightly higher clock speed 1,072 MHz vs 1,038 MHz Around 5% higher clock speed
Slightly higher turbo clock speed 1,176 MHz vs 1,127 MHz Around 5% higher turbo clock speed

Benchmarks Real world tests of GeForce GTX 980M vs 945A

Bitcoin mining Data courtesy CompuBench

GeForce GTX 980M
331.65 mHash/s
GeForce 945A
107.63 mHash/s

Face detection Data courtesy CompuBench

GeForce GTX 980M
108.4 mPixels/s
GeForce 945A
28.87 mPixels/s

Ocean surface simulation Data courtesy CompuBench

GeForce GTX 980M
1,138.49 frames/s
GeForce 945A
381.9 frames/s

Particle simulation Data courtesy CompuBench

GeForce GTX 980M
1,026.9 mInteraction/s
GeForce 945A
316.59 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

GeForce GTX 980M
7.27 frames/s
GeForce 945A
2.01 frames/s

Video composition Data courtesy CompuBench

GeForce GTX 980M
89.57 frames/s
GeForce 945A
30.79 frames/s

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