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Differences What are the advantages of each

Front view of Radeon Pro 555

Reasons to consider the
AMD Radeon Pro 555

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Higher clock speed 850 MHz vs 725 MHz More than 15% higher clock speed
Higher effective memory clock speed 5,100 MHz vs 3,600 MHz More than 40% higher effective memory clock speed
More memory 2,048 MB vs 512 MB 4x more memory
Slightly higher texture rate 40.8 GTexel/s vs 17.4 GTexel/s More than 2.2x higher texture rate
Slightly higher pixel rate 13.6 GPixel/s vs 5.8 GPixel/s More than 2.2x higher pixel rate
Higher memory clock speed 1,275 MHz vs 900 MHz More than 40% higher memory clock speed
More texture mapping units 48 vs 24 Twice as many texture mapping units
More render output processors 16 vs 8 Twice as many render output processors
Slightly more shading units 768 vs 480 288 more shading units
More compute units 12 vs 6 Twice as many compute units
Front view of Radeon HD 6770M Mac

Reasons to consider the
AMD Radeon HD 6770M Mac

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Lower TDP 35W vs 100W 2.9x lower TDP

Features Key features of the Radeon Pro 555  vs HD 6770M Mac 

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

Radeon Pro 555
81.6 GB/s

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

Radeon Pro 555
13.6 GPixel/s
Radeon HD 6770M Mac
5.8 GPixel/s

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

Radeon Pro 555
40.8 GTexel/s
Radeon HD 6770M Mac
17.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon Pro 555
1,305.6 GFLOPS
Radeon HD 6770M Mac
696 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 Pro 555  vs
HD 6770M Mac 
GPU brand AMD AMD
GPU name Tobago Whistler
Clock speed 850 MHz 725 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 768 480
Texture mapping units 48 24
Render output processors 16 8
Compute units 12 6
Pixel rate 13.6 GPixel/s 5.8 GPixel/s
Texture rate 40.8 GTexel/s 17.4 GTexel/s
Floating-point performance 1,305.6 GFLOPS 696 GFLOPS

memory

Radeon Pro 555  vs
HD 6770M Mac 
Memory clock speed 1,275 MHz 900 MHz
Effective memory clock speed 5,100 MHz 3,600 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 512 MB
Memory type GDDR5 GDDR5
Memory bandwidth 81.6 GB/s 57.6 GB/s

noise and power

TDP 100W 35W

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