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Differences What are the advantages of each

Front view of Mobility Radeon HD 5165

Reasons to consider the
ATi Mobility Radeon HD 5165

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Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More texture mapping units 32 vs 16 Twice as many texture mapping units
Front view of GeForce 840M

Reasons to consider the
Nvidia GeForce 840M

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Much higher clock speed 1,029 MHz vs 600 MHz More than 70% higher clock speed
Better PassMark score 879 vs 284 More than 3x better PassMark score
Higher memory clock speed 1,001 MHz vs 900 MHz More than 10% higher memory clock speed

Benchmarks Real world tests of Mobility Radeon HD 5165 vs GeForce 840M

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Mobility Radeon HD 5165  vs GeForce 840M 

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

GeForce 840M
16.02 GB/s

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

GeForce 840M
8.23 GPixel/s

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

Mobility Radeon HD 5165
19.2 GTexel/s
GeForce 840M
16.46 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce 840M
790.3 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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