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Differences What are the advantages of each

Front view of Radeon HD 6850

Reasons to consider the
AMD Radeon HD 6850

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Higher clock speed 775 MHz vs 575 MHz Around 35% higher clock speed
Higher effective memory clock speed 4,000 MHz vs 1,600 MHz 2.5x higher effective memory clock speed
Higher memory bandwidth 128 GB/s vs 25.6 GB/s 5x higher memory bandwidth
Higher pixel rate 24.8 GPixel/s vs 9.2 GPixel/s Around 2.8x higher pixel rate
More render output processors 32 vs 16 Twice as many render output processors
Higher memory clock speed 1,000 MHz vs 800 MHz 25% higher memory clock speed
Front view of Radeon HD 6830M

Reasons to consider the
AMD Radeon HD 6830M

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Lower TDP 39W vs 127W 3.3x lower TDP

Features Key features of the Radeon HD 6850  vs 6830M 

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

Radeon HD 6850
128 GB/s
Radeon HD 6830M
25.6 GB/s

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

Radeon HD 6850
24.8 GPixel/s
Radeon HD 6830M
9.2 GPixel/s

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

Radeon HD 6850
37.2 GTexel/s
Radeon HD 6830M
23 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6850
1,488 GFLOPS
Radeon HD 6830M
920 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 6850  vs
6830M 
GPU brand AMD AMD
GPU name Barts PRO Granville
Market Desktop Laptop
Clock speed 775 MHz 575 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 24.8 GPixel/s 9.2 GPixel/s
Texture rate 37.2 GTexel/s 23 GTexel/s
Floating-point performance 1,488 GFLOPS 920 GFLOPS

memory

Radeon HD 6850  vs
6830M 
Memory clock speed 1,000 MHz 800 MHz
Effective memory clock speed 4,000 MHz 1,600 MHz
Memory bus 256 bit 128 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 DDR3
Memory bandwidth 128 GB/s 25.6 GB/s

noise and power

TDP 127W 39W

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