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Differences What are the advantages of each

Front view of Radeon HD 6490M Mac

Reasons to consider the
AMD Radeon HD 6490M Mac

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GPUBoss is not aware of any important advantages of the AMD Radeon HD 6490M Mac vs the Nvidia GeForce GT 650M Mac.

Front view of GeForce GT 650M Mac

Reasons to consider the
Nvidia GeForce GT 650M Mac

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Higher clock speed 900 MHz vs 750 MHz 20% higher clock speed
Higher effective memory clock speed 5,016 MHz vs 3,176 MHz Around 60% higher effective memory clock speed
Higher memory bandwidth 80.3 GB/s vs 25.41 GB/s Around 3.2x higher memory bandwidth
Higher texture rate 28.8 GTexel/s vs 6 GTexel/s More than 4.8x higher texture rate
Significantly higher memory clock speed 1,254 MHz vs 794 MHz Around 60% higher memory clock speed
Slightly better floating-point performance 691.2 GFLOPS vs 240 GFLOPS Around 3x better floating-point performance
More render output processors 16 vs 4 12 more render output processors
More texture mapping units 32 vs 8 24 more texture mapping units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More shading units 384 vs 160 224 more shading units

Features Key features of the Radeon HD 6490M Mac  vs GeForce GT 650M 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 6490M Mac
3 GPixel/s
GeForce GT 650M Mac
7.2 GPixel/s

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

Radeon HD 6490M Mac
6 GTexel/s
GeForce GT 650M Mac
28.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6490M Mac
GeForce GT 650M Mac
691.2 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

Specifications Full list of technical specs


Radeon HD 6490M Mac  vs
GeForce GT 650M Mac 
GPU brand AMD Nvidia
GPU name Seymour GK107
Market Laptop Laptop
Clock speed 750 MHz 900 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 160 384
Texture mapping units 8 32
Render output processors 4 16
Pixel rate 3 GPixel/s 7.2 GPixel/s
Texture rate 6 GTexel/s 28.8 GTexel/s
Floating-point performance 240 GFLOPS 691.2 GFLOPS


Radeon HD 6490M Mac  vs
GeForce GT 650M Mac 
Memory clock speed 794 MHz 1,254 MHz
Effective memory clock speed 3,176 MHz 5,016 MHz
Memory bus 64 bit 128 bit
Memory 256 MB 512 MB
Memory type GDDR5 GDDR5
Memory bandwidth 25.41 GB/s 80.3 GB/s


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