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Differences What are the advantages of each

Front view of Radeon HD 6830M

Reasons to consider the
AMD Radeon HD 6830M

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Lower TDP 39W vs 108W 2.8x lower TDP
Front view of Radeon HD 6770

Reasons to consider the
AMD Radeon HD 6770

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Higher clock speed 850 MHz vs 575 MHz Around 50% higher clock speed
Significantly higher effective memory clock speed 4,800 MHz vs 1,600 MHz 3x higher effective memory clock speed
Higher memory bandwidth 76.8 GB/s vs 25.6 GB/s Around 3x higher memory bandwidth
Higher memory clock speed 1,200 MHz vs 800 MHz 50% higher memory clock speed

Features Key features of the Radeon HD 6830M  vs 6770 

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

Radeon HD 6830M
25.6 GB/s
Radeon HD 6770
76.8 GB/s

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

Radeon HD 6830M
9.2 GPixel/s
Radeon HD 6770
13.6 GPixel/s

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

Radeon HD 6830M
23 GTexel/s
Radeon HD 6770
34 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6830M
920 GFLOPS
Radeon HD 6770
1,360 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 6830M  vs
6770 
GPU brand AMD AMD
GPU name Granville Juniper XT
Market Laptop Desktop
Clock speed 575 MHz 850 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 800 800
Texture mapping units 40 40
Render output processors 16 16
Compute units 10 10
Pixel rate 9.2 GPixel/s 13.6 GPixel/s
Texture rate 23 GTexel/s 34 GTexel/s
Floating-point performance 920 GFLOPS 1,360 GFLOPS

memory

Radeon HD 6830M  vs
6770 
Memory clock speed 800 MHz 1,200 MHz
Effective memory clock speed 1,600 MHz 4,800 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 1,024 MB
Memory type DDR3 GDDR5
Memory bandwidth 25.6 GB/s 76.8 GB/s

noise and power

TDP 39W 108W

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