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Differences What are the advantages of each

Front view of GeForce GT 730M

Reasons to consider the
Nvidia GeForce GT 730M

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Higher clock speed 719 MHz vs 580 MHz Around 25% higher clock speed
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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Slightly lower TDP 12W vs 33W 2.7x lower TDP

Features Key features of the GeForce GT 730M  vs 9400M 

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

GeForce GT 730M
5.75 GPixel/s
GeForce 9400M
2.32 GPixel/s

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

GeForce GT 730M
11.5 GTexel/s
GeForce 9400M
4.64 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 730M
552.2 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 730M  vs
9400M 
GPU brand Nvidia Nvidia
GPU name GK208 C79MX
Clock speed 719 MHz 580 MHz
Is dual GPU No No
Reference card None None

noise and power

TDP 33W 12W

raw performance

GeForce GT 730M  vs
9400M 
Shading units 384 16
Texture mapping units 16 8
Render output processors 8 4
Pixel rate 5.75 GPixel/s 2.32 GPixel/s
Texture rate 11.5 GTexel/s 4.64 GTexel/s
Floating-point performance 552.2 GFLOPS 44.8 GFLOPS

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