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Differences What are the advantages of each

Front view of Radeon RX 480

Reasons to consider the
AMD Radeon RX 480

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Much more memory 8,192 MB vs 2,048 MB 4x more memory
Significantly higher effective memory clock speed 8,000 MHz vs 6,000 MHz Around 35% higher effective memory clock speed
Higher clock speed 1,120 MHz vs 925 MHz More than 20% higher clock speed
Higher memory bandwidth 256 GB/s vs 192 GB/s Around 35% higher memory bandwidth
Better floating-point performance 5,834 GFLOPS vs 3,789 GFLOPS Around 55% better floating-point performance
Higher texture rate 182.3 GTexel/s vs 118.4 GTexel/s Around 55% higher texture rate
Higher turbo clock speed 1,266 MHz vs 975 MHz Around 30% higher turbo clock speed
Significantly higher memory clock speed 2,000 MHz vs 1,500 MHz Around 35% higher memory clock speed
Higher pixel rate 40.5 GPixel/s vs 29.6 GPixel/s More than 35% higher pixel rate
More shading units 2,304 vs 2,048 256 more shading units
More texture mapping units 144 vs 128 16 more texture mapping units
Slightly more compute units 36 vs 32 4 more compute units
Lower TDP 150W vs 185W Around 20% lower TDP
Front view of Radeon HD 8870

Reasons to consider the
AMD Radeon HD 8870

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GPUBoss is not aware of any important advantages of the Radeon HD 8870 vs the Radeon RX 480.

Features Key features of the Radeon RX 480  vs HD 8870 

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

Radeon RX 480
256 GB/s
Radeon HD 8870
192 GB/s

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

Radeon RX 480
40.5 GPixel/s
Radeon HD 8870
29.6 GPixel/s

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

Radeon RX 480
182.3 GTexel/s
Radeon HD 8870
118.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX 480
5,834 GFLOPS
Radeon HD 8870
3,789 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 RX 480  vs
HD 8870 
GPU brand AMD AMD
GPU name Ellesmere Hainan XT
Market Desktop Desktop
Clock speed 1,120 MHz 925 MHz
Turbo clock speed 1,266 MHz 975 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 2,304 2,048
Texture mapping units 144 128
Render output processors 32 32
Compute units 36 32
Pixel rate 40.5 GPixel/s 29.6 GPixel/s
Texture rate 182.3 GTexel/s 118.4 GTexel/s
Floating-point performance 5,834 GFLOPS 3,789 GFLOPS

memory

Radeon RX 480  vs
HD 8870 
Memory clock speed 2,000 MHz 1,500 MHz
Effective memory clock speed 8,000 MHz 6,000 MHz
Memory bus 256 bit 256 bit
Memory 8,192 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 256 GB/s 192 GB/s

noise and power

TDP 150W 185W

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