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Differences What are the advantages of each

Front view of GeForce GT 520

Reasons to consider the
Nvidia GeForce GT 520

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Significantly higher clock speed 810 MHz vs 600 MHz 35% higher clock speed
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher memory clock speed 898 MHz vs 700 MHz Around 30% higher memory clock speed
Lower TDP 29W vs 58W 2x lower TDP
Front view of GeForce GT 220

Reasons to consider the
Nvidia GeForce GT 220

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Higher pixel rate 9.6 GPixel/s vs 1.62 GPixel/s Around 6x higher pixel rate
More render output processors 16 vs 2 14 more render output processors
Slightly higher memory bandwidth 44.8 GB/s vs 14.4 GB/s More than 3x higher memory bandwidth
Wider memory bus 128 bit vs 64 bit 2x wider memory bus

Benchmarks Real world tests of GeForce GT 520 vs 220

Passmark Industry standard benchmark for overall graphics card performance

Features Key features of the GeForce GT 520  vs 220 

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

GeForce GT 520
14.4 GB/s
GeForce GT 220
44.8 GB/s

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

GeForce GT 520
1.62 GPixel/s
GeForce GT 220
9.6 GPixel/s

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

GeForce GT 520
6.48 GTexel/s
GeForce GT 220
14.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 520
155.5 GFLOPS
GeForce GT 220
144 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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