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Differences What are the advantages of each

Front view of GeForce GT 320M

Reasons to consider the
Nvidia GeForce GT 320M

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

Reasons to consider the
Nvidia GeForce 9400M

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Higher clock speed 580 MHz vs 500 MHz More than 15% higher clock speed

Features Key features of the GeForce GT 320M  vs 9400M 

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

GeForce GT 320M
4 GPixel/s
GeForce 9400M
2.32 GPixel/s

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

GeForce GT 320M
4 GTexel/s
GeForce 9400M
4.64 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 320M
52.8 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 320M  vs
9400M 
GPU brand Nvidia Nvidia
GPU name GT216 C79MX
Clock speed 500 MHz 580 MHz
Is dual GPU No No
Reference card Nvidia GeForce GT 320M 500 MHz 512 MB None

noise and power

TDP 23W 12W

raw performance

GeForce GT 320M  vs
9400M 
Shading units 24 16
Texture mapping units 8 8
Render output processors 8 4
Pixel rate 4 GPixel/s 2.32 GPixel/s
Texture rate 4 GTexel/s 4.64 GTexel/s
Floating-point performance 52.8 GFLOPS 44.8 GFLOPS

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