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Radeon HD 6870 vs Radeon RX 560

Intro

The Radeon HD 6870 comes with a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is comprised of 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon RX 560, which has a GPU core clock speed of 1175 MHz, and 4096 MB of GDDR5 memory running at 7000 MHz through a 128-bit bus. It also is made up of 1024 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560 80 Watts
Radeon HD 6870 151 Watts
Difference: 71 Watts (89%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6870 should theoretically be a small bit better than the Radeon RX 560 overall. (explain)

Radeon HD 6870 134400 MB/sec
Radeon RX 560 114688 MB/sec
Difference: 19712 (17%)

Texel Rate

The Radeon RX 560 should be much (approximately 49%) better at texture filtering than the Radeon HD 6870. (explain)

Radeon RX 560 75200 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 24800 (49%)

Pixel Rate

The Radeon HD 6870 will be quite a bit (approximately 53%) faster with regards to full screen anti-aliasing than the Radeon RX 560, and should be able to handle higher resolutions better. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon RX 560 18800 Mpixels/sec
Difference: 10000 (53%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 6870

Amazon.com

Check prices at:

Radeon RX 560

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 6870 Radeon RX 560
Manufacturer AMD AMD
Year October 2010 May 2017
Code Name Barts XT Baffin
Memory 1024 MB 4096 MB
Core Speed 900 MHz 1175 MHz
Memory Speed 4200 MHz 28000 MHz
Power (Max TDP) 151 watts 80 watts
Bandwidth 134400 MB/sec 114688 MB/sec
Texel Rate 50400 Mtexels/sec 75200 Mtexels/sec
Pixel Rate 28800 Mpixels/sec 18800 Mpixels/sec
Unified Shaders 1120 1024
Texture Mapping Units 56 64
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 14 nm
Transistors 1700 million 3000 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.6

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 6870

Amazon.com

Check prices at:

Radeon RX 560

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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