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Differences What are the advantages of each

Front view of GeForce 9500M GS

Reasons to consider the
Nvidia GeForce 9500M GS

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Higher memory clock speed 700 MHz vs 500 MHz 40% higher memory clock speed
Slightly lower TDP 20W vs 40W 2x lower TDP
Front view of GeForce 8400 GS PCI

Reasons to consider the
SPARKLE GeForce 8400 GS PCI

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Slightly higher clock speed 520 MHz vs 475 MHz Around 10% higher clock speed

Features Key features of the GeForce 9500M GS  vs 8400 GS PCI 

memory bandwidth Rate at which data can be read from or stored in onboard memory

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

GeForce 9500M GS
3.8 GPixel/s
GeForce 8400 GS PCI
2.08 GPixel/s

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

GeForce 9500M GS
7.6 GTexel/s
GeForce 8400 GS PCI
4.16 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce 9500M GS
60.8 GFLOPS
GeForce 8400 GS PCI
39.36 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

Specifications Full list of technical specs

gpu

GeForce 9500M GS  vs
8400 GS PCI 
GPU brand Nvidia Nvidia
GPU name G84 G86
Market Laptop Desktop
Clock speed 475 MHz 520 MHz
Is dual GPU No No
Reference card None Nvidia GeForce 8400 GS PCI 520 MHz 512 MB

raw performance

Shading units 32 16
Texture mapping units 16 8
Render output processors 8 4
Pixel rate 3.8 GPixel/s 2.08 GPixel/s
Texture rate 7.6 GTexel/s 4.16 GTexel/s
Floating-point performance 60.8 GFLOPS 39.36 GFLOPS

memory

GeForce 9500M GS  vs
8400 GS PCI 
Memory clock speed 700 MHz 500 MHz
Effective memory clock speed 1,400 MHz 1,000 MHz
Memory bus 128 bit 64 bit
Memory 512 MB 512 MB
Memory type GDDR3 DDR3
Memory bandwidth 22.4 GB/s 8 GB/s

noise and power

TDP 20W 40W

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