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Differences What are the advantages of each

Front view of GeForce GT 630M

Reasons to consider the
Nvidia GeForce GT 630M

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Significantly higher clock speed 800 MHz vs 450 MHz Around 80% higher clock speed
Higher effective memory clock speed 3,600 MHz vs 1,400 MHz More than 2.5x higher effective memory clock speed
Better PassMark score 678 vs 297 More than 2.2x better PassMark score
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher memory clock speed 900 MHz vs 700 MHz Around 30% higher memory clock speed
Front view of GeForce GT 325M

Reasons to consider the
Nvidia GeForce GT 325M

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Slightly more render output processors 8 vs 4 Twice as many render output processors
Slightly lower TDP 23W vs 33W More than 30% lower TDP

Benchmarks Real world tests of GeForce GT 630M vs 325M

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GT 630M  vs 325M 

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

GeForce GT 630M
32 GB/s
GeForce GT 325M
22.4 GB/s

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

GeForce GT 630M
3.2 GPixel/s
GeForce GT 325M
3.6 GPixel/s

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

GeForce GT 630M
12.8 GTexel/s
GeForce GT 325M
7.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 630M
307.2 GFLOPS
GeForce GT 325M
95.04 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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