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Differences What are the advantages of each

Front view of Radeon HD 7650A

Reasons to consider the
AMD Radeon HD 7650A

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Lower TDP 33W vs 75W 2.3x lower TDP
Front view of Radeon HD 6970M Mac

Reasons to consider the
AMD Radeon HD 6970M Mac

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Significantly higher memory bandwidth 115.2 GB/s vs 28.8 GB/s 4x higher memory bandwidth
Higher effective memory clock speed 3,600 MHz vs 1,800 MHz 2x higher effective memory clock speed
Higher clock speed 680 MHz vs 600 MHz Around 15% higher clock speed
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher pixel rate 21.76 GPixel/s vs 4.8 GPixel/s More than 4.5x higher pixel rate
Significantly more render output processors 32 vs 8 24 more render output processors
Better floating-point performance 1,305.6 GFLOPS vs 576 GFLOPS More than 2.2x better floating-point performance
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More shading units 960 vs 480 Twice as many shading units
Higher texture rate 32.6 GTexel/s vs 14.4 GTexel/s More than 2.2x higher texture rate
More texture mapping units 48 vs 24 Twice as many texture mapping units
More compute units 12 vs 6 Twice as many compute units

Features Key features of the Radeon HD 7650A  vs 6970M Mac 

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

Radeon HD 7650A
28.8 GB/s
Radeon HD 6970M Mac
115.2 GB/s

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

Radeon HD 7650A
4.8 GPixel/s
Radeon HD 6970M Mac
21.76 GPixel/s

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

Radeon HD 7650A
14.4 GTexel/s
Radeon HD 6970M Mac
32.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7650A
576 GFLOPS
Radeon HD 6970M Mac
1,305.6 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 7650A  vs
6970M Mac 
GPU brand AMD AMD
GPU name Onega Blackcomb
Market Laptop Laptop
Clock speed 600 MHz 680 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 480 960
Texture mapping units 24 48
Render output processors 8 32
Compute units 6 12
Pixel rate 4.8 GPixel/s 21.76 GPixel/s
Texture rate 14.4 GTexel/s 32.6 GTexel/s
Floating-point performance 576 GFLOPS 1,305.6 GFLOPS

memory

Radeon HD 7650A  vs
6970M Mac 
Memory clock speed 900 MHz 900 MHz
Effective memory clock speed 1,800 MHz 3,600 MHz
Memory bus 128 bit 256 bit
Memory 1,024 MB 2,048 MB
Memory type DDR3 GDDR5
Memory bandwidth 28.8 GB/s 115.2 GB/s

noise and power

TDP 33W 75W

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