Radeon HD 6490M Mac 

Released May, 2011
  • 750 MHz
  • 256 MB GDDR5

Features Key features of the Radeon HD 6490M Mac

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

Radeon HD 6490M Mac
25.41 GB/s

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
Radeon HD 6750M Mac
4.78 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
Radeon HD 6750M Mac
14.35 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6490M Mac
GeForce GT 650M Mac
691.2 GFLOPS
Radeon HD 6750M Mac
574.1 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

Radeon HD 6490M Mac

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Radeon HD 6490M Mac

Specifications Full list of technical specs


GPU brand AMD
GPU name Seymour
Market Laptop
Clock speed 750 MHz
Is dual GPU No
Reference card None

raw performance

Shading units 160
Texture mapping units 8
Render output processors 4
Compute units 2
Pixel rate 3 GPixel/s
Texture rate 6 GTexel/s
Floating-point performance 240 GFLOPS


Memory clock speed 794 MHz
Effective memory clock speed 3,176 MHz
Memory bus 64 bit
Memory 256 MB
Memory type GDDR5
Memory bandwidth 25.41 GB/s
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