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Differences What are the advantages of each

Front view of Radeon HD 6970M

Reasons to consider the
AMD Radeon HD 6970M

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Significantly higher memory bandwidth 115.2 GB/s vs 25.28 GB/s More than 4.5x higher memory bandwidth
Higher effective memory clock speed 3,600 MHz vs 1,580 MHz More than 2.2x higher effective memory clock speed
Better floating-point performance 1,305.6 GFLOPS vs 435.2 GFLOPS Around 3x better floating-point performance
Higher pixel rate 21.76 GPixel/s vs 5.44 GPixel/s 4x higher pixel rate
More memory 1,024 MB vs 256 MB 4x more memory
Significantly more render output processors 32 vs 8 24 more render output processors
More shading units 960 vs 320 Three times as many shading units
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More compute units 12 vs 4 Three times as many compute units
More texture mapping units 48 vs 32 16 more texture mapping units
Higher memory clock speed 900 MHz vs 790 MHz Around 15% higher memory clock speed
Front view of Mobility Radeon HD 4670 Mac

Reasons to consider the
ATi Mobility Radeon HD 4670 Mac

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Lower TDP 35W vs 75W 2.1x lower TDP

Features Key features of the Radeon HD 6970M  vs Mobility Radeon HD 4670 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 6970M
21.76 GPixel/s

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

Radeon HD 6970M
32.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6970M
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


Radeon HD 6970M  vs
Mobility Radeon HD 4670 Mac 
GPU name Blackcomb M96
Market Laptop Laptop
Clock speed 680 MHz 680 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 960 320
Texture mapping units 48 32
Render output processors 32 8
Compute units 12 4
Pixel rate 21.76 GPixel/s 5.44 GPixel/s
Texture rate 32.6 GTexel/s 21.76 GTexel/s
Floating-point performance 1,305.6 GFLOPS 435.2 GFLOPS


Radeon HD 6970M  vs
Mobility Radeon HD 4670 Mac 
Memory clock speed 900 MHz 790 MHz
Effective memory clock speed 3,600 MHz 1,580 MHz
Memory bus 256 bit 128 bit
Memory 1,024 MB 256 MB
Memory type GDDR5 GDDR3
Memory bandwidth 115.2 GB/s 25.28 GB/s

noise and power

TDP 75W 35W


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