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Differences What are the advantages of each

Front view of Radeon HD 3870 Mac

Reasons to consider the
ATi Radeon HD 3870 Mac

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Higher clock speed 777 MHz vs 600 MHz Around 30% higher clock speed
Higher memory bandwidth 72.06 GB/s vs 28.8 GB/s More than 2.5x higher memory bandwidth
Higher pixel rate 12.43 GPixel/s vs 2.4 GPixel/s Around 5.2x higher pixel rate
More render output processors 16 vs 4 12 more render output processors
Higher memory clock speed 1,126 MHz vs 900 MHz More than 25% higher memory clock speed
Front view of GeForce GT 525M

Reasons to consider the
Nvidia GeForce GT 525M

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Lower TDP 23W vs 106W 4.6x lower TDP

Features Key features of the Radeon HD 3870 Mac  vs GeForce GT 525M 

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

Radeon HD 3870 Mac
72.06 GB/s
GeForce GT 525M
28.8 GB/s

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

Radeon HD 3870 Mac
12.43 GPixel/s
GeForce GT 525M
2.4 GPixel/s

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

Radeon HD 3870 Mac
12.43 GTexel/s
GeForce GT 525M
9.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3870 Mac
497.3 GFLOPS
GeForce GT 525M
230.4 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 3870 Mac  vs
GeForce GT 525M 
GPU brand ATI Nvidia
GPU name RV670 GF108
Market Desktop Laptop
Clock speed 777 MHz 600 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 320 96
Texture mapping units 16 16
Render output processors 16 4
Pixel rate 12.43 GPixel/s 2.4 GPixel/s
Texture rate 12.43 GTexel/s 9.6 GTexel/s
Floating-point performance 497.3 GFLOPS 230.4 GFLOPS

memory

Radeon HD 3870 Mac  vs
GeForce GT 525M 
Memory clock speed 1,126 MHz 900 MHz
Effective memory clock speed 2,252 MHz 1,800 MHz
Memory bus 256 bit 128 bit
Memory 512 MB 1,024 MB
Memory type GDDR4 DDR3
Memory bandwidth 72.06 GB/s 28.8 GB/s

noise and power

TDP 106W 23W

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