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Differences What are the advantages of each

Front view of GeForce GT 650M

Reasons to consider the
Nvidia GeForce GT 650M

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Higher clock speed 850 MHz vs 580 MHz More than 45% higher clock speed
More render output processors 16 vs 4 12 more render output processors
More texture mapping units 32 vs 8 24 more texture mapping units
More shading units 384 vs 16 368 more shading units
Front view of GeForce 9400M

Reasons to consider the
Nvidia GeForce 9400M

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Lower TDP 12W vs 45W 3.7x lower TDP

Features Key features of the GeForce GT 650M  vs 9400M 

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

GeForce GT 650M
6.8 GPixel/s
GeForce 9400M
2.32 GPixel/s

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

GeForce GT 650M
27.2 GTexel/s
GeForce 9400M
4.64 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 650M
652.8 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 650M  vs
9400M 
GPU brand Nvidia Nvidia
GPU name GK107 C79MX
Clock speed 850 MHz 580 MHz
Is dual GPU No No
Reference card None None

noise and power

TDP 45W 12W

raw performance

GeForce GT 650M  vs
9400M 
Shading units 384 16
Texture mapping units 32 8
Render output processors 16 4
Pixel rate 6.8 GPixel/s 2.32 GPixel/s
Texture rate 27.2 GTexel/s 4.64 GTexel/s
Floating-point performance 652.8 GFLOPS 44.8 GFLOPS

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