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Differences What are the advantages of each

Front view of GeForce GT 540M

Reasons to consider the
Nvidia GeForce GT 540M

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Higher clock speed 672 MHz vs 589 MHz Around 15% higher clock speed
Slightly higher effective memory clock speed 1,800 MHz vs 1,200 MHz 50% higher effective memory clock speed
Higher memory clock speed 900 MHz vs 600 MHz 50% higher memory clock speed
Front view of GeForce 505

Reasons to consider the
Nvidia GeForce 505

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Slightly lower TDP 25W vs 35W Around 30% lower TDP

Benchmarks Real world tests of GeForce GT 540M vs 505

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the GeForce GT 540M  vs 505 

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

GeForce GT 540M
28.8 GB/s
GeForce 505
9.6 GB/s

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

GeForce GT 540M
2.69 GPixel/s
GeForce 505
2.36 GPixel/s

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

GeForce GT 540M
10.75 GTexel/s
GeForce 505
4.71 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 540M
258.05 GFLOPS
GeForce 505
44.86 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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