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Differences What are the advantages of each

Front view of Radeon HD 6970M Mac

Reasons to consider the
AMD Radeon HD 6970M Mac

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Higher clock speed 680 MHz vs 503 MHz More than 35% higher clock speed
Higher effective memory clock speed 3,600 MHz vs 1,700 MHz More than 2x higher effective memory clock speed
Higher memory bandwidth 115.2 GB/s vs 54.4 GB/s More than 2x higher memory bandwidth
More memory 2,048 MB vs 512 MB 4x more memory
Higher pixel rate 21.76 GPixel/s vs 8.05 GPixel/s Around 2.8x higher pixel rate
Better floating-point performance 1,305.6 GFLOPS vs 804.8 GFLOPS More than 60% better floating-point performance
More render output processors 32 vs 16 Twice as many render output processors
Slightly higher texture rate 32.6 GTexel/s vs 20.12 GTexel/s More than 60% higher texture rate
Front view of Mobility Radeon HD 4850 Mac

Reasons to consider the
ATi Mobility Radeon HD 4850 Mac

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GPUBoss is not aware of any important advantages of the ATi Mobility Radeon HD 4850 Mac vs the AMD Radeon HD 6970M Mac.

Features Key features of the Radeon HD 6970M Mac  vs Mobility Radeon HD 4850 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 Mac
21.76 GPixel/s

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

Radeon HD 6970M Mac
32.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

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 6970M Mac  vs
Mobility Radeon HD 4850 Mac 
GPU brand AMD ATI
GPU name Blackcomb M98
Market Laptop Laptop
Clock speed 680 MHz 503 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 960 800
Texture mapping units 48 40
Render output processors 32 16
Compute units 12 10
Pixel rate 21.76 GPixel/s 8.05 GPixel/s
Texture rate 32.6 GTexel/s 20.12 GTexel/s
Floating-point performance 1,305.6 GFLOPS 804.8 GFLOPS

memory

Radeon HD 6970M Mac  vs
Mobility Radeon HD 4850 Mac 
Memory clock speed 900 MHz 850 MHz
Effective memory clock speed 3,600 MHz 1,700 MHz
Memory bus 256 bit 256 bit
Memory 2,048 MB 512 MB
Memory type GDDR5 GDDR3
Memory bandwidth 115.2 GB/s 54.4 GB/s

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