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Differences What are the advantages of each

Front view of Mobility Radeon HD 4670

Reasons to consider the
ATi Mobility Radeon HD 4670

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Higher clock speed 675 MHz vs 500 MHz 35% higher clock speed
More shading units 320 vs 32 288 more shading units
More texture mapping units 32 vs 16 Twice as many texture mapping units
Front view of GeForce GT 120M Mac

Reasons to consider the
Nvidia GeForce GT 120M Mac

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Lower TDP 14W vs 35W 2.5x lower TDP

Features Key features of the Mobility Radeon HD 4670  vs GeForce GT 120M Mac 

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

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

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

Mobility Radeon HD 4670
21.6 GTexel/s
GeForce GT 120M Mac
8 GTexel/s

floating point performance How fast the gpu can crunch numbers

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

Specifications Full list of technical specs

gpu

Mobility Radeon HD 4670  vs
GeForce GT 120M Mac 
GPU brand ATI Nvidia
GPU name M96 G96C
Market Laptop Laptop
Clock speed 675 MHz 500 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 320 32
Texture mapping units 32 16
Render output processors 8 8
Pixel rate 5.4 GPixel/s 4 GPixel/s
Texture rate 21.6 GTexel/s 8 GTexel/s
Floating-point performance 432 GFLOPS 80 GFLOPS

memory

Mobility Radeon HD 4670  vs
GeForce GT 120M Mac 
Memory clock speed 800 MHz 792 MHz
Effective memory clock speed 1,600 MHz 1,584 MHz
Memory bus 128 bit 128 bit
Memory 512 MB 256 MB
Memory type GDDR3 GDDR3
Memory bandwidth 25.6 GB/s 25.34 GB/s

noise and power

TDP 35W 14W

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