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Radeon HD 7970 vs Radeon RX 470

Intro

The Radeon HD 7970 has a GPU core speed of 925 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1375 MHz through a 384-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon RX 470, which features a core clock frequency of 926 MHz and a GDDR5 memory speed of 1650 MHz. It also makes use of a 256-bit memory bus, and uses a 14 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 470 11756 points
Radeon HD 7970 8225 points
Difference: 3531 (43%)

Ethereum Mining Hash Rate

Radeon RX 470 26 Mh/s
Radeon HD 7970 21 Mh/s
Difference: 5 (24%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 120 Watts
Radeon HD 7970 250 Watts
Difference: 130 Watts (108%)

Memory Bandwidth

Theoretically, the Radeon HD 7970 should perform much faster than the Radeon RX 470 in general. (explain)

Radeon HD 7970 264000 MB/sec
Radeon RX 470 211200 MB/sec
Difference: 52800 (25%)

Texel Rate

The Radeon RX 470 will be a bit (about 0%) better at texture filtering than the Radeon HD 7970. (explain)

Radeon RX 470 118528 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 128 (0%)

Pixel Rate

The Radeon RX 470 should be a bit (more or less 0%) better at FSAA than the Radeon HD 7970, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 470 29632 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 32 (0%)

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 7970

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 7970 Radeon RX 470
Manufacturer AMD AMD
Year January 2012 August 2016
Code Name Tahiti XT Polaris 10
Memory 3072 MB 8192 MB
Core Speed 925 MHz 926 MHz
Memory Speed 5500 MHz 6600 MHz
Power (Max TDP) 250 watts 120 watts
Bandwidth 264000 MB/sec 211200 MB/sec
Texel Rate 118400 Mtexels/sec 118528 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 29632 Mpixels/sec
Unified Shaders 2048 2048
Texture Mapping Units 128 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics 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 Render Output Units by the clock speed of the card. 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 rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 7970

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.

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