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Differences What are the advantages of each

Front view of GeForce GT 120 Mac

Reasons to consider the
Nvidia GeForce GT 120 Mac

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Slightly more render output processors 8 vs 4 Twice as many render output processors
Slightly more texture mapping units 16 vs 8 Twice as many texture mapping units
Front view of GeForce 9400M

Reasons to consider the
Nvidia GeForce 9400M

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Lower TDP 12W vs 50W 4.2x lower TDP

Features Key features of the GeForce GT 120 Mac  vs 9400M 

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

GeForce GT 120 Mac
4.4 GPixel/s
GeForce 9400M
2.32 GPixel/s

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

GeForce GT 120 Mac
8.8 GTexel/s
GeForce 9400M
4.64 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 120 Mac
89.6 GFLOPS
GeForce 9400M
44.8 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

GeForce GT 120 Mac  vs
9400M 
GPU brand Nvidia Nvidia
GPU name G96 C1 C79MX
Clock speed 550 MHz 580 MHz
Is dual GPU No No
Reference card None None

noise and power

TDP 50W 12W

raw performance

GeForce GT 120 Mac  vs
9400M 
Shading units 32 16
Texture mapping units 16 8
Render output processors 8 4
Pixel rate 4.4 GPixel/s 2.32 GPixel/s
Texture rate 8.8 GTexel/s 4.64 GTexel/s
Floating-point performance 89.6 GFLOPS 44.8 GFLOPS

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