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Differences What are the advantages of each

Front view of GeForce GTS 250M

Reasons to consider the
Nvidia GeForce GTS 250M

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Higher effective memory clock speed 3,200 MHz vs 1,802 MHz Around 80% higher effective memory clock speed
Higher memory bandwidth 51.2 GB/s vs 28.83 GB/s Around 80% higher memory bandwidth
Slightly higher texture rate 40 GTexel/s vs 25.92 GTexel/s Around 55% higher texture rate
Slightly lower TDP 28W vs 45W Around 40% lower TDP
Front view of GeForce GT 740M

Reasons to consider the
Nvidia GeForce GT 740M

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Significantly higher clock speed 810 MHz vs 500 MHz More than 60% higher clock speed
More memory 2,048 MB vs 1,024 MB 2x more memory
Slightly better floating-point performance 622.1 GFLOPS vs 240 GFLOPS More than 2.5x better floating-point performance
More render output processors 16 vs 8 Twice as many render output processors
More shading units 384 vs 96 288 more shading units
Higher memory clock speed 901 MHz vs 800 MHz Around 15% higher memory clock speed

Benchmarks Real world tests of GeForce GTS 250M vs GT 740M

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Features Key features of the GeForce GTS 250M  vs GT 740M 

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

GeForce GTS 250M
51.2 GB/s
GeForce GT 740M
28.83 GB/s

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

GeForce GTS 250M
10 GPixel/s
GeForce GT 740M
6.48 GPixel/s

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

GeForce GTS 250M
40 GTexel/s
GeForce GT 740M
25.92 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTS 250M
240 GFLOPS
GeForce GT 740M
622.1 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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