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Differences What are the advantages of each

Front view of GeForce GT 9400

Reasons to consider the
Nvidia GeForce GT 9400

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Slightly higher clock speed 550 MHz vs 506 MHz Around 10% higher clock speed
Slightly lower TDP 50W vs 58W Around 15% lower TDP
Front view of GeForce GT 220

Reasons to consider the
Nvidia GeForce GT 220

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Higher effective memory clock speed 1,400 MHz vs 800 MHz 75% higher effective memory clock speed
Higher memory clock speed 700 MHz vs 400 MHz 75% higher memory clock speed

Features Key features of the GeForce GT 9400  vs 220 

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

GeForce GT 9400
12.8 GB/s
GeForce GT 220
22.4 GB/s

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

GeForce GT 9400
2.2 GPixel/s
GeForce GT 220
4.05 GPixel/s

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

GeForce GT 9400
4.4 GTexel/s
GeForce GT 220
8.1 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 9400
44.8 GFLOPS
GeForce GT 220
97.15 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 GT 9400  vs
220 
GPU brand Nvidia Nvidia
GPU name G96 C1 GT215
Market Desktop Desktop
Clock speed 550 MHz 506 MHz
Is dual GPU No No
Reference card None Nvidia GeForce GT 220 600 MHz 1 GB

raw performance

Shading units 16 48
Texture mapping units 8 16
Render output processors 4 8
Pixel rate 2.2 GPixel/s 4.05 GPixel/s
Texture rate 4.4 GTexel/s 8.1 GTexel/s
Floating-point performance 44.8 GFLOPS 97.15 GFLOPS

memory

GeForce GT 9400  vs
220 
Memory clock speed 400 MHz 700 MHz
Effective memory clock speed 800 MHz 1,400 MHz
Memory bus 128 bit 128 bit
Memory 512 MB 512 MB
Memory type GDDR3 GDDR3
Memory bandwidth 12.8 GB/s 22.4 GB/s

noise and power

TDP 50W 58W

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