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Differences What are the advantages of each

Front view of GeForce 820M

Reasons to consider the
Nvidia GeForce 820M

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Higher clock speed 625 MHz vs 450 MHz Around 40% higher clock speed
Front view of GeForce 320M Mac

Reasons to consider the
Nvidia GeForce 320M Mac

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GPUBoss is not aware of any important advantages of the 320M Mac Edition vs the 820M.

Features Key features of the GeForce 820M  vs 320M Mac 

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

GeForce 820M
2.5 GPixel/s
GeForce 320M Mac
3.6 GPixel/s

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

GeForce 820M
10 GTexel/s
GeForce 320M Mac
7.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce 820M
240 GFLOPS
GeForce 320M Mac
91.2 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

render output processors GPU commponents responsible for transform pixels as they flow between memory buffers

Specifications Full list of technical specs

gpu

GeForce 820M  vs
320M Mac 
GPU brand Nvidia Nvidia
GPU name GF117 MCP89
Clock speed 625 MHz 450 MHz
Is dual GPU No No
Reference card None None

noise and power

TDP 15W 23W

raw performance

GeForce 820M  vs
320M Mac 
Shading units 96 48
Texture mapping units 16 16
Render output processors 8 8
Pixel rate 2.5 GPixel/s 3.6 GPixel/s
Texture rate 10 GTexel/s 7.2 GTexel/s
Floating-point performance 240 GFLOPS 91.2 GFLOPS

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