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Differences What are the advantages of each

Front view of Radeon HD 8510

Reasons to consider the
AMD Radeon HD 8510

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Much lower TDP 39W vs 175W 4.5x lower TDP
Front view of Radeon HD 7870

Reasons to consider the
AMD Radeon HD 7870

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Much higher effective memory clock speed 4,800 MHz vs 1,000 MHz More than 4.8x higher effective memory clock speed
Much higher memory bandwidth 153.6 GB/s vs 16 GB/s More than 9.5x higher memory bandwidth
Significantly higher clock speed 1,000 MHz vs 650 MHz Around 55% higher clock speed
Better floating-point performance 2,560 GFLOPS vs 520 GFLOPS Around 5x better floating-point performance
Higher texture rate 80 GTexel/s vs 13 GTexel/s Around 6.2x higher texture rate
Higher pixel rate 32 GPixel/s vs 5.2 GPixel/s Around 6.2x higher pixel rate
More memory 2,048 MB vs 1,024 MB 2x more memory
Significantly more render output processors 32 vs 8 24 more render output processors
Significantly more texture mapping units 80 vs 20 60 more texture mapping units
Much higher memory clock speed 1,200 MHz vs 500 MHz Around 2.5x higher memory clock speed
Significantly more shading units 1,280 vs 400 880 more shading units
More compute units 20 vs 5 15 more compute units
Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Features Key features of the Radeon HD 8510  vs 7870 

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

Radeon HD 8510
16 GB/s
Radeon HD 7870
153.6 GB/s

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

Radeon HD 8510
5.2 GPixel/s
Radeon HD 7870
32 GPixel/s

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

Radeon HD 8510
13 GTexel/s
Radeon HD 7870
80 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8510
520 GFLOPS
Radeon HD 7870
2,560 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 8510  vs
7870 
GPU brand AMD AMD
GPU name Redwood Pitcairn XT
Market Desktop Desktop
Clock speed 650 MHz 1,000 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 400 1,280
Texture mapping units 20 80
Render output processors 8 32
Compute units 5 20
Pixel rate 5.2 GPixel/s 32 GPixel/s
Texture rate 13 GTexel/s 80 GTexel/s
Floating-point performance 520 GFLOPS 2,560 GFLOPS

memory

Radeon HD 8510  vs
7870 
Memory clock speed 500 MHz 1,200 MHz
Effective memory clock speed 1,000 MHz 4,800 MHz
Memory bus 128 bit 256 bit
Memory 1,024 MB 2,048 MB
Memory type GDDR3 GDDR5
Memory bandwidth 16 GB/s 153.6 GB/s

noise and power

TDP 39W 175W

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