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Differences What are the advantages of each

Front view of Radeon HD 8850

Reasons to consider the
AMD Radeon HD 8850

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Significantly higher memory bandwidth 153.6 GB/s vs 64 GB/s Around 2.5x higher memory bandwidth
Higher clock speed 1,000 MHz vs 800 MHz 25% higher clock speed
Better floating-point performance 3,072 GFLOPS vs 768 GFLOPS 4x better floating-point performance
Higher texture rate 96 GTexel/s vs 19.2 GTexel/s 5x higher texture rate
Higher pixel rate 32 GPixel/s vs 6.4 GPixel/s 5x higher pixel rate
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher effective memory clock speed 4,800 MHz vs 4,000 MHz 20% higher effective memory clock speed
Significantly more texture mapping units 96 vs 24 72 more texture mapping units
Significantly more shading units 1,536 vs 480 1056 more shading units
Significantly more render output processors 32 vs 8 24 more render output processors
More compute units 24 vs 6 18 more compute units
Higher memory clock speed 1,200 MHz vs 1,000 MHz 20% higher memory clock speed
Slightly wider memory bus 256 bit vs 128 bit 2x wider memory bus
Front view of Radeon HD 6670

Reasons to consider the
AMD Radeon HD 6670

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Significantly lower TDP 66W vs 150W 2.3x lower TDP

Features Key features of the Radeon HD 8850  vs 6670 

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

Radeon HD 8850
153.6 GB/s
Radeon HD 6670
64 GB/s

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

Radeon HD 8850
32 GPixel/s
Radeon HD 6670
6.4 GPixel/s

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

Radeon HD 8850
96 GTexel/s
Radeon HD 6670
19.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8850
3,072 GFLOPS
Radeon HD 6670

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 8850  vs
GPU name Hainan PRO Turks XT
Market Desktop Desktop
Clock speed 1,000 MHz 800 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,536 480
Texture mapping units 96 24
Render output processors 32 8
Compute units 24 6
Pixel rate 32 GPixel/s 6.4 GPixel/s
Texture rate 96 GTexel/s 19.2 GTexel/s
Floating-point performance 3,072 GFLOPS 768 GFLOPS


Radeon HD 8850  vs
Memory clock speed 1,200 MHz 1,000 MHz
Effective memory clock speed 4,800 MHz 4,000 MHz
Memory bus 256 bit 128 bit
Memory 2,048 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 153.6 GB/s 64 GB/s

noise and power

TDP 150W 66W

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