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Differences What are the advantages of each

Front view of GeForce GTX 280M

Reasons to consider the
Nvidia GeForce GTX 280M

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Higher memory bandwidth 60.8 GB/s vs 32 GB/s Around 90% higher memory bandwidth
More texture mapping units 64 vs 16 48 more texture mapping units
Higher texture rate 37.44 GTexel/s vs 12.8 GTexel/s Around 3x higher texture rate
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More render output processors 16 vs 4 12 more render output processors
Front view of GeForce GT 630M

Reasons to consider the
Nvidia GeForce GT 630M

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Higher clock speed 800 MHz vs 585 MHz More than 35% higher clock speed
Higher effective memory clock speed 3,600 MHz vs 1,900 MHz Around 90% higher effective memory clock speed
More memory 2,048 MB vs 1,024 MB 2x more memory
Lower TDP 33W vs 75W 2.3x lower TDP

Benchmarks Real world tests of GeForce GTX 280M vs GT 630M

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GTX 280M  vs GT 630M 

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

GeForce GTX 280M
60.8 GB/s
GeForce GT 630M
32 GB/s

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

GeForce GTX 280M
9.36 GPixel/s
GeForce GT 630M
3.2 GPixel/s

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

GeForce GTX 280M
37.44 GTexel/s
GeForce GT 630M
12.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 280M
374.5 GFLOPS
GeForce GT 630M
307.2 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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