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Radeon HD 6970 vs Radeon RX 470

Intro

The Radeon HD 6970 features a GPU core speed of 880 MHz, and the 2048 MB of GDDR5 memory runs at 1375 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 Texture Address Units, and 32 Raster Operation Units.

Compare those specs to the Radeon RX 470, which uses a 14 nm design. AMD has clocked the core frequency at 926 MHz. The GDDR5 memory runs at a frequency of 1650 MHz on this card. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon HD 6970 250 Watts
Difference: 130 Watts (108%)

Memory Bandwidth

The Radeon RX 470 should in theory perform a little bit faster than the Radeon HD 6970 in general. (explain)

Radeon RX 470 211200 MB/sec
Radeon HD 6970 176000 MB/sec
Difference: 35200 (20%)

Texel Rate

The Radeon RX 470 is quite a bit (approximately 40%) better at texture filtering than the Radeon HD 6970. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon HD 6970 84480 Mtexels/sec
Difference: 34048 (40%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 470 is the winner, but only just. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon HD 6970 28160 Mpixels/sec
Difference: 1472 (5%)

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 6970

Amazon.com

Radeon RX 470

Amazon.com

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 6970 Radeon RX 470
Manufacturer AMD AMD
Year December 2010 August 2016
Code Name Cayman XT Polaris 10
Memory 2048 MB 8192 MB
Core Speed 880 MHz 926 MHz
Memory Speed 5500 MHz 6600 MHz
Power (Max TDP) 250 watts 120 watts
Bandwidth 176000 MB/sec 211200 MB/sec
Texel Rate 84480 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 1536 2048
Texture Mapping Units 96 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 14 nm
Transistors 2640 million 5700 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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