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Differences What are the advantages of each

Front view of GeForce GT 320M

Reasons to consider the
Nvidia GeForce GT 320M

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Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of GeForce 840M

Reasons to consider the
Nvidia GeForce 840M

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Much better T-Rex score 3,359.62 vs 1,777.54 Around 90% better T-Rex score
Much higher clock speed 1,029 MHz vs 500 MHz More than 2x higher clock speed
Better PassMark score 879 vs 276 Around 3.2x better PassMark score
Better floating-point performance 790.3 GFLOPS vs 52.8 GFLOPS Around 15x better floating-point performance
More shading units 384 vs 24 360 more shading units
Higher memory clock speed 1,001 MHz vs 790 MHz More than 25% higher memory clock speed

Benchmarks Real world tests of GeForce GT 320M vs 840M

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 320M
GeForce 840M

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