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Differences What are the advantages of each

Front view of Radeon HD 2600 XT Mac

Reasons to consider the
ATi Radeon HD 2600 XT Mac

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Higher clock speed 700 MHz vs 550 MHz More than 25% higher clock speed
Front view of GeForce GT 120 Mac

Reasons to consider the
Nvidia GeForce GT 120 Mac

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Slightly more render output processors 8 vs 4 Twice as many render output processors
Slightly more texture mapping units 16 vs 8 Twice as many texture mapping units

Features Key features of the Radeon HD 2600 XT Mac  vs GeForce GT 120 Mac 

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

Radeon HD 2600 XT Mac
2.8 GPixel/s
GeForce GT 120 Mac
4.4 GPixel/s

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

Radeon HD 2600 XT Mac
5.6 GTexel/s
GeForce GT 120 Mac
8.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

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 2600 XT Mac  vs
GeForce GT 120 Mac 
GPU brand ATI Nvidia
GPU name RV630 G96 C1
Market Desktop Desktop
Clock speed 700 MHz 550 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 120 32
Texture mapping units 8 16
Render output processors 4 8
Pixel rate 2.8 GPixel/s 4.4 GPixel/s
Texture rate 5.6 GTexel/s 8.8 GTexel/s
Floating-point performance 168 GFLOPS 89.6 GFLOPS

memory

Radeon HD 2600 XT Mac  vs
GeForce GT 120 Mac 
Memory clock speed 800 MHz 800 MHz
Effective memory clock speed 1,600 MHz 1,600 MHz
Memory bus 128 bit 128 bit
Memory 256 MB 512 MB
Memory type GDDR3 GDDR3
Memory bandwidth 25.6 GB/s 25.6 GB/s

noise and power

TDP 45W 50W

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