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Differences What are the advantages of each

Front view of GeForce 9400M

Reasons to consider the
Nvidia GeForce 9400M

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Higher clock speed 580 MHz vs 450 MHz Around 30% higher clock speed
Front view of GeForce 320M Mac

Reasons to consider the
Nvidia GeForce 320M 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

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

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

GeForce 9400M
2.32 GPixel/s
GeForce 320M Mac
3.6 GPixel/s

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

GeForce 9400M
4.64 GTexel/s
GeForce 320M Mac
7.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce 9400M
GeForce 320M Mac

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


GeForce 9400M  vs
320M Mac 
GPU brand Nvidia Nvidia
GPU name C79MX MCP89
Clock speed 580 MHz 450 MHz
Is dual GPU No No
Reference card None None

noise and power

TDP 12W 23W

raw performance

GeForce 9400M  vs
320M Mac 
Shading units 16 48
Texture mapping units 8 16
Render output processors 4 8
Pixel rate 2.32 GPixel/s 3.6 GPixel/s
Texture rate 4.64 GTexel/s 7.2 GTexel/s
Floating-point performance 44.8 GFLOPS 91.2 GFLOPS


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