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Differences What are the advantages of each

Front view of GeForce GT 720M

Reasons to consider the
Nvidia GeForce GT 720M

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Higher clock speed 625 MHz vs 500 MHz 25% higher clock speed
Better PassMark score 542 vs 276 More than 95% better PassMark score
More memory 2,048 MB vs 1,024 MB 2x more memory
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

Benchmarks Real world tests of GeForce GT 720M vs 320M

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GT 720M  vs 320M 

memory bandwidth Rate at which data can be read from or stored in onboard memory

GeForce GT 720M
12.8 GB/s
GeForce GT 320M
25.28 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

GeForce GT 720M
2.5 GPixel/s
GeForce GT 320M
4 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

GeForce GT 720M
10 GTexel/s
GeForce GT 320M
4 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 720M
240 GFLOPS
GeForce GT 320M
52.8 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

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