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Differences What are the advantages of each

Front view of Radeon HD 2400

Reasons to consider the
ATi Radeon HD 2400

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Lower TDP 20W vs 50W 2.5x lower TDP
Front view of GeForce GT 120 Mac

Reasons to consider the
Nvidia GeForce GT 120 Mac

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Higher clock speed 550 MHz vs 398 MHz Around 40% higher clock speed
Higher effective memory clock speed 1,600 MHz vs 990 MHz More than 60% higher effective memory clock speed
Higher memory bandwidth 25.6 GB/s vs 7.92 GB/s Around 3.2x higher memory bandwidth
Higher memory clock speed 800 MHz vs 495 MHz More than 60% higher memory clock speed
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Slightly more texture mapping units 16 vs 4 12 more texture mapping units

Features Key features of the Radeon HD 2400  vs GeForce GT 120 Mac 

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

Radeon HD 2400
7.92 GB/s
GeForce GT 120 Mac
25.6 GB/s

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

Radeon HD 2400
1.59 GPixel/s
GeForce GT 120 Mac
4.4 GPixel/s

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

Radeon HD 2400
1.59 GTexel/s
GeForce GT 120 Mac
8.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 2400
31.84 GFLOPS
GeForce GT 120 Mac
89.6 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

Radeon HD 2400  vs
GeForce GT 120 Mac 
GPU brand ATI Nvidia
GPU name RV610 G96 C1
Market Desktop Desktop
Clock speed 398 MHz 550 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 40 32
Texture mapping units 4 16
Render output processors 4 8
Pixel rate 1.59 GPixel/s 4.4 GPixel/s
Texture rate 1.59 GTexel/s 8.8 GTexel/s
Floating-point performance 31.84 GFLOPS 89.6 GFLOPS

memory

Radeon HD 2400  vs
GeForce GT 120 Mac 
Memory clock speed 495 MHz 800 MHz
Effective memory clock speed 990 MHz 1,600 MHz
Memory bus 64 bit 128 bit
Memory 256 MB 512 MB
Memory type DDR2 GDDR3
Memory bandwidth 7.92 GB/s 25.6 GB/s

noise and power

TDP 20W 50W

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