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Differences What are the advantages of each

Front view of GeForce GT 750M

Reasons to consider the
Nvidia GeForce GT 750M

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Better PassMark score 1,288 vs 873 Around 50% better PassMark score
Higher effective memory clock speed 4,000 MHz vs 2,002 MHz Around 2x higher effective memory clock speed
Higher memory bandwidth 64 GB/s vs 16.02 GB/s Around 4x higher memory bandwidth
More memory 2,048 MB vs 1,024 MB 2x more memory
More render output processors 16 vs 8 Twice as many render output processors
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More texture mapping units 32 vs 16 Twice as many texture mapping units
Front view of GeForce 840A

Reasons to consider the
Nvidia GeForce 840A

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Much better T-Rex score 3,360.38 vs 1,414.38 Around 2.5x better T-Rex score
Higher clock speed 1,029 MHz vs 941 MHz Around 10% higher clock speed
Higher turbo clock speed 1,124 MHz vs 967 MHz More than 15% higher turbo clock speed
Slightly lower TDP 33W vs 50W Around 35% lower TDP

Benchmarks Real world tests of GeForce GT 750M vs 840A

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 750M
1,414.38
GeForce 840A
3,360.38

Manhattan (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 750M
1,079.19
GeForce 840A
3,613.42

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