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Radeon HD 7970 vs Radeon RX 480 4GB

Intro

The Radeon HD 7970 makes use of a 28 nm design. AMD has clocked the core speed at 925 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this particular model. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon RX 480 4GB, which comes with a clock speed of 1120 MHz and a GDDR5 memory speed of 1750 MHz. It also uses a 256-bit memory bus, and makes use of a 14 nm design. It is made up of 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

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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.

Ethereum Mining Hash Rate

Radeon RX 480 4GB 25 Mh/s
Radeon HD 7970 21 Mh/s
Difference: 4 (19%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB 150 Watts
Radeon HD 7970 250 Watts
Difference: 100 Watts (67%)

Memory Bandwidth

In theory, the Radeon HD 7970 should be 15% faster than the Radeon RX 480 4GB overall, because of its higher bandwidth. (explain)

Radeon HD 7970 264000 MB/sec
Radeon RX 480 4GB 229376 MB/sec
Difference: 34624 (15%)

Texel Rate

The Radeon RX 480 4GB should be a lot (approximately 36%) faster with regards to anisotropic filtering than the Radeon HD 7970. (explain)

Radeon RX 480 4GB 161280 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 42880 (36%)

Pixel Rate

The Radeon RX 480 4GB will be a lot (approximately 21%) faster with regards to anti-aliasing than the Radeon HD 7970, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 480 4GB 35840 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 6240 (21%)

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

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Radeon RX 480 4GB

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 7970 Radeon RX 480 4GB
Manufacturer AMD AMD
Year January 2012 June 2016
Code Name Tahiti XT Polaris 10
Memory 3072 MB 4096 MB
Core Speed 925 MHz 1120 MHz
Memory Speed 5500 MHz 7000 MHz
Power (Max TDP) 250 watts 150 watts
Bandwidth 264000 MB/sec 229376 MB/sec
Texel Rate 118400 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 2048 2304
Texture Mapping Units 128 144
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: Bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units 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 a second.

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

Display Prices

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Radeon HD 7970

Amazon.com

Check prices at:

Radeon RX 480 4GB

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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