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Differences What are the advantages of each

Front view of Radeon HD 6480G IGP

Reasons to consider the
IGP Radeon HD 6480G IGP

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Slightly more shading units 240 vs 96 144 more shading units
Front view of GeForce GT 420M

Reasons to consider the
Nvidia GeForce GT 420M

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Slightly higher clock speed 500 MHz vs 444 MHz Around 15% higher clock speed
Slightly lower TDP 23W vs 35W Around 35% lower TDP

Features Key features of the Radeon HD 6480G IGP  vs GeForce GT 420M 

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

Radeon HD 6480G IGP
1.78 GPixel/s
GeForce GT 420M
2 GPixel/s

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

Radeon HD 6480G IGP
5.33 GTexel/s
GeForce GT 420M
8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6480G IGP
213.1 GFLOPS
GeForce GT 420M
192 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

render output processors GPU commponents responsible for transform pixels as they flow between memory buffers

Specifications Full list of technical specs

gpu

Radeon HD 6480G IGP  vs
GeForce GT 420M 
GPU brand AMD Nvidia
GPU name BeaverCreek GF108
Clock speed 444 MHz 500 MHz
Is dual GPU No No
Reference card None None

noise and power

TDP 35W 23W

raw performance

Radeon HD 6480G IGP  vs
GeForce GT 420M 
Shading units 240 96
Texture mapping units 12 16
Render output processors 4 4
Pixel rate 1.78 GPixel/s 2 GPixel/s
Texture rate 5.33 GTexel/s 8 GTexel/s
Floating-point performance 213.1 GFLOPS 192 GFLOPS

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