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Radeon HD 6870 vs Radeon RX 560

Intro

The Radeon HD 6870 makes use of a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM runs at a speed of 1050 MHz on this model. It features 1120 SPUs along with 56 TAUs and 32 ROPs.

Compare those specifications to the Radeon RX 560, which comes with core clock speeds of 1175 MHz on the GPU, and 7000 MHz on the 4096 MB of GDDR5 memory. It features 1024 SPUs along with 64 Texture Address Units and 16 Rasterization Operator 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

Performance-wise, the Radeon HD 6870 should theoretically be a small bit superior to 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 is quite a bit (approximately 49%) better at anisotropic 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 should be much (approximately 53%) faster with regards to FSAA than the Radeon RX 560, and will be capable of handling 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 (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum 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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